From big stars like Harry Potter’s Daniel Radcliffe and FHM’s #1 sexy female of 2008 Megan Fox to relatively unknowns ones such as Gemma Arterton of new James Bond flick Quantum of Solace and Anton Elchin of Terminator 4, they range but one thing they all have in common is being young and hot in Hollywood.

AOL’s Moviefone.com offered its 2nd Annual list of top 25 stars under age 25, and among popular celebrities there is Oscar-nominated Keira Knightley, 23, as well as Michael Cera, 20, of Juno.

Moviefone editor-in-chief Scott Robson said:

There are several returning people, but what’s really exciting is there’s this whole new crop coming up. We look at what they’ve done in the past, but we’re mostly concerned with what they have coming over the course of the next year and where it positions them.”

What’s the difference between such stars as Daniel Radcliffe, Megan Fox and Keira Knightley? Until recently they were united by nothing, except cinema, but now all of them entered a general rating - 25 hottest Hollywood stars aged till 25 years. These days it seems like Hollywood has been overrun by the young. Some have been around and onscreen for much of their lives like Scarlett Johansson, while others are new fresh faces on the scene.

So which stars will be entertaining us in 2018 or even in 2028?

Meet them, here they are!

1 Megan Fox

Age 22

22-year-old Megan Fox sizzles at the first place of a rating. She already had time to subdue tops of many ratings of the most attractive and sexual due to her boldness and amazing body. Sultry brunette star has drawn comparisons to Angelina Jolie. And, her last name is Fox!

Famous For: Megan is famous for Transformers and being the FHM’s sexiest female of 2008.

What’s Next: This fall’s comedy How to Lose Friends and Alienate People; Whore(really!?), Jennifer’s Body (a comedy horror by Juno scribe Diablo Cody); and Transformers 2.

2 Michael Cera

Age 20

20-year-old Michael Cera occupies the second line. In his filmography there are already more than 30 pictures. One of films with his participation - Juno (2007) - was even nominated on Oscar.

Famous For: Cera made the leap from TV star Arrested Development to box office draw with the Superbad and the Oscar-nominated Juno.

What’s Next: He’ll follow up October’s Nick and Norah’s Infinite Playlist with starring roles in Year One, Youth in Revolt and Scott Pilgrim vs. the World.

3 Emma Watson

Age18

The girl from the secular society, the bright Hermione, the good girl fashionista Emma Watson.

Famous for: A role of Hermione in a series of films about Harry Potter brought her real fame. By the way, Daniel Radcliffe, who played Harry, also entered to this list, having occupied the eighth line. We witnessed her transformation right from a cute kid into a hot adult.
Harry Potter‘ producer David Heyman says of Emma:

She is one of the brightest people I have ever met, with a razor-sharp mind. After seeing her work in Half-Blood Prince, I can assuredly say she can do it all. She is a great comedienne, and brings real gravitas to the dramatic scenes.”

What’s Next: She’ll voice Princess Pea in this winter’s The Tale of Desperaux, then really break out of the Potter mold in 09’s Napoleon and Betsy.

4 Dakota Fanning

Age14

Famous For: The mature-beyond-her-years teen has done blockbusters War of the Worlds, Oscar bait I Am Sam and edgy indie fare Hounddog.

What’s Next: She appears in fall’s Secret Life of Bees before next year starring in and swearing in the sci-fi thriller Push and voicing the title character in Henry Selick’s stop-motion animated Coraline.

5 Amanda Seyfried

Age 23

Famous For: Made polygamy palatable in HBO’s Big Love and ABBA au courant as the lead in this summer’s Mamma Mia! co-starring with Meryl Streep.

What’s Next: She co-stars with Megan Fox in Jennifer’s Body and just landed opposite Channing Tatum in Lasse Hallstrom’s adaptation of a Nicholas Sparks novel, Dear John.

6 Shia LaBeouf

Age 22

Famous For: From Disney teen Even Stevens, Holes to blockbuster action star Transformers co-starring hottie Megan Fox, Indiana Jones and Wanted co-starring with Angelina Jolie. Innocent looking stud reunited with Disturbia director Caruso in this month’s thriller Eagle Eye.

What’s Next: Next summer’s Transformers 2: Revenge of the Fallen.

7 Keira Knightley

Age 23

Famous For: She’s the most favorable one for out of the list. She was equally amazing in the Pirates Of The Caribbean’s series and Oscar-nominated period dramas Pride and Prejudice and stunning leads in Atonement and her latest The Duchess.

What’s Next: Highbrow drama King Lear.

8 Daniel Radcliffe

Age 19

Famous For: He is the beloved wizard boy Harry Potter! He’s also made headlines by going full frontal for the London stage revival of Equus.

What’s Next: Harry Potter and the Half-Blood Prince is due in theaters next summer, and after putting his “wand” on display in the Broadway run of Equus he’ll return to London to begin filming the two-part Potter finale, The Deathly Hallows.

9 Kristen Stewart

Age 18

Famous For: She co-starred Jodie Foster in Panic Room, Stewart’s continued to shine in both critical faves Into the Wild and duds Jumper.

What’s Next: She’s Bella in Twilight, the teen vampire flick widely touted to be the next Harry Potter.

10 Ellen Page

Age 21

Famous For: She played Kitty Pride in X-Men: The Last Stand, but her turn as a pregnant teen in Juno made her a household name and scored her an Oscar nod.

What’s Next: She’ll star in the thriller Peacock, play a roller derby skater in Drew Barrymore’s Whip It! and take the title role in a new adaptation of Charlotte Bronte’s Jane Eyre.

11 Saoirse Ronan

Age 14

Famous For: Oscar nomination for Atonement co-starring Keira Knightley

What’s Next: Most notably, she headlines Peter Jackson’s anticipated adaptation of The Lovely Bones.

12 Anton Elchin

Age 19

Star of Russian origin, Anton Elchin, was born in Saint Petersburg in a family of figure skaters. At the age of one and a half parents took him to the US, where Anton lives now.

Elchin started to act in films and serials since 11 years. Last picture with his participation – is Terminator 4: The Future Begins.

Famous For: The next big thing! He’s impressed in movies that had trouble finding audiences Alpha Dog co-starring Justin Timberlake, Fierce People, Charlie Bartlett.

What’s Next: The actor’s next two projects Star Trek and Terminator Salvation should have no such trouble as finding audience. Both are slated for a summer 2009.

13 Brandon T. Jackson

Age 24

What He’s Done: After roles in the sleeper hits Roll Bounce and This Christmas, Jackson emerged as a comic force playing Alpa Chino in the summer blockbuster Tropic Thunder.

What’s Next: Jackson continues his string of great character names as Lil 1 in the Crash-like ensemble drama Days of Wrath.

14 Emma Stone

Age 19

What She’s Done: Comedy actress from the super hit Superbad to lesser films The Rocker and The House Bunny.

What’s Next: Matthew McConaughey romantic chick-flick The Ghosts of Girlfriends Past, by Mean Girls director Mark Waters.

15 Zac Efron

Age 20

High School Musical’s hunkiest heartthrob is on the minds of girls everywhere.

Famous For: The pinup’s made a smooth transition from small screen High School Musical to big Hairspray.

What’s Next: He plays a young Matthew Perry in the Big-like fantasy Seventeen Again and gets dramatic in Me and Orson Welles.

16 Olivia Thirlby

Age 21

What She’s Done: With credits like Juno, Snow Angels, and The Wackness under her belt, she’s the closest thing to an Indie It-Girl.

What’s Next: After early 09’s ‘New York I Love You, she’ll co-star with Anna Paquin and Matt Damon in Margaret and Hilary Duff in Safety Glass.

17 Christopher Mintz-Plasse

Age 19

What He’s Done: He’s the McLovin, he earned a permanent place in the Movie Nerd Hall of Fame in last year’s Superbad.

What’s Next: He stars in the fall comedy Role Models with Paul Rudd. In 2009, he’ll reunite with Michael Cera in Year One and co-star with Nicolas Cage in Kick-Ass. He’s still a nerd.

18 Blake Lively

Age 21

Famous For: The Sisterhood of the Traveling Pants, Accepted, oversexed teen Serena of the Gossip Girl.

What’s Next: She’s in for more sex and high school intrigue on ‘GG‘ season 2, and she’ll return to the big screen in The Private Lives of Pippa Lee.

19 Josh Peck

Age 22

What He’s Done: Mean Creek, The Wackness, he was still better known to the Nickelodeon set as one-half of Drake and Josh.

What’s Next: American Primitive and Safety Glass.

20 Kat Dennings

Age 22

Famous For: She was Catherine Keener’s not-quite-sexually-active daughter in 40-Year-Old Virgin; played a goth girl who gets an Anna Faris makeover in The House Bunny.

What’s Next: She plays Michael Cera’s possible soul mate in Nick and Norah’s Infinite Playlist, then stars in Robert Rodriguez’s kid-friendly Shorts and the college football flick End Zone.

21 Keke Palmer

Age 15

What She’s Done: The actress/singer first drew audiences under her spell in Akeelah and the Bee, and has since starred in Madea’s Family Reunion and The Longshots.

What’s Next: Madea Goes to Jail before co-starring with Kevin Spacey in Shrink and playing rap pioneer Roxanne Shante in Vapors.

22 Miley Cyrus

Age 15

With the popularity of Hannah Montana, there’s Miley Mania everywhere for this young Disneyote, and she’s only 15! And she’s already involved in scandals of sexual manner.

Famous For: Hannah Montana/Miley Cyrus: Best of Both Worlds concert flick shocked the movie industry with a $31 million opening weekend.

What’s Next: She lends her voice to fall’s animated Disney flick Bolt, Hannah Montana

23 Robert Pattinson

Age 22

What He’s Done: The Londoner was Hufflepuff Quidditch stud Cedric Diggory in two installments of Harry Potter (Goblet of Fire and Order of the Phoenix).

What’s Next: Hopefully Potter hysteria prepared him well for playing vampire dreamboat Edward Cullen in the next page-to-screen phenomenon, Twilight.

24 Gemma Arterton

Age 22

What She’s Done: The new Brit on the block is bursting on the scene with a pivotal role in this year’s Bond, Quantum of Solace, and a part in Guy Ritchie’s Rocknrolla.

What’s Next: English comedy The Boat That Rocked, but you’re sure to see her in the epic action The Prince of Persia.

25 Scarlett Johansson

Age 23

She first made her onscreen debut at age 14 in Horse Whisperer and has gone on to become Woody Allen’s muse and Ryan Reynold’s real life leading lady.

Famous For: Girl With A Pearl Earring, Match Point, Lost in Translation, she’s been Woody Allen’s muse in a trifecta of films and generally made men swoon. She’s a face to luxurious brands.

What’s Next: She’ll star opposite Jennifer Aniston and Drew Barrymore in He’s Just Not That Into You, and will play a comic-book vixen in The Spirit.

The trailer for the sixth film in the Harry Potter series, Harry Potter and the Half Blood Prince, has been released online.

Judging be the teaser trailer I can say Half Blood Prince could be a much darker and more intense than previous releases. Some scenes in the trailer are more reminiscent of a horror film. David Yates returns for his second stint in the director’s chair.

The trailer opens with a worried looking Harry Potter (Daniel Radcliffe), before wizard Dumbledore glances into the past with a flashback to Lord Voldemort’s origins.

Voldemort is tightening his grip on both the Muggle and wizarding worlds and Hogwarts is no longer the safe haven it once was. Harry suspects that dangers may even lie within the castle, but Dumbledore is more intent upon preparing him for the final battle that he knows is fast approaching. Together they work to find the key to unlock Voldemort’s defenses and, to this end, Dumbledore recruits his old friend and colleague, the well-connected and unsuspecting bon vivant Professor Horace Slughorn, whom he believes holds crucial information.

Meanwhile, the students are under attack from a very different adversary as teenage hormones rage across the ramparts. Harry finds himself more and more drawn to Ginny, but so is Dean Thomas. And Lavender Brown has decided that Ron is the one for her, only she hadn’t counted on Romilda Vane’s chocolates!

And then there’s Hermione, simpering with jealously but determined not to show her feelings. As romance blossoms, one student remains aloof. He is determined to make his mark, albeit a dark one. Love is in the air, but tragedy lies ahead and Hogwarts may never be the same again.

Cast includes Daniel Radcliffe, Rupert Grint, Emma Watson, Helena Bonham Carter, David Bradley, Jim Broadbent, Jessie Cave, Robbie Coltrane, Warwick Davis, Frank Dillane, Tom Felton, Michael Gambon, Matthew Lewis, Evanna Lynch, Helen McCrory, Alan Rickman, Maggie Smith, Natalia Tena, Hero Fiennes Tiffin, Julie Walters, David Thewlis and Bonnie Wright.

Can’t wait to see Harry Potter and the Half Blood Prince? Will be out soon! Have you read the book? Drop a line of your expectations for the movie.

Just take a moment to think back to your own teen style. Well, as for me, I can’t look at some of my teenage pics. They’re awful! Especially the one featuring me in that purple dress I put on for my best friend’s birthday. Yuck! Anyway, most teens face similar clothing problems. Teenagehood is the time you start looking for your style, it’s the time you make fashion mistakes and learn the right things about your style preferences. It’s the time of stylish ups and downs.

When it concerns stars, and teen stars in particular, they are short of time for thinking: they need to rush to the red carpet! These teens can feel no shame looking back on their teen style. Let’s check out some under - aged celebrities who can be taken for style icons:

Let’s take Harry Potter cutie Emma Watson. She’s only 17 but it’s obvious she’s got an eye for couture that turned her into a real princess of style.

High School Musical star Vanessa Hudgens, 19, can’t do without super glam gowns.

We must not forget 19-year old superstar Rihanna. She’s young but promising. She’s got a musical ear (thank you Jay-Z for showing her to the world!) and a huge sense of style (I just wonder is it her stylist or her parents I should thank for it?)

Teen heartthrobs The Jonas Brothers never miss. These siblings seem to be able to teach teens a thing or two about fashion. They should have used the chance to teach Mr. George W. Bush as well when visiting the White House.

Queen of the teen scene, Miley Cyrus, 15, loves to play dress-up on the red carpet and already favors some of the world’s top designers.

Chris Brown, 18, likes to mix hip-hop street style and high fashion. Well, he has to be up to the level: Rihanna has a great sense of style.

Country princess Taylor Swift can rock not only at concerts but on the red carpet as well. Her feminine frocks make all girls envy. She’s only 17 but she knows how not to spoil impression. Hope she won’t lose this talent when getting older.

George Clooney, watch out! Here’s a new red carpet king in town! Zac Efron, 20, prefers to wear perfectly tailored suits and stylish ties when posing before cameras and millions of fans sitting and looking at him on the screen. He’s sexy! (Did I say it out loud?)

Emma Roberts, 17, has something to brag about. Julia Roberts is her aunt, Eric Roberts is her dad! But there’s more, this teen actress has an ability to look grown up and elegant being so young. Must confess not many adult actresses have this ability, unfortunately. This makes her a real teen style icon.

Harry Potter star Daniel Radcliffe doesn’t need magic to look great. He’s not afraid to take risks. It might sound funny but he can still look hot wearing a strange leather vest he posed in for Details in June 2007.

There’s another almost-under-aged so-called star I think of. Lindsay Lohan. But on the other hand… don’t think some of her outfits have anything to do with style.