WHO: Emma Watson. AGE: Turns 21. WHEN: April 15. KNOWN FOR: Winning the role of Harry Potter's Hermione Granger at the tender age of 8! Since then, she has taken on the world!
WHO: Kristen Stewart. AGE: Turns 21. WHEN: April 9. KNOWN FOR: Going from virtual unknown actress to mega-star overnight, off the back of the massive success of the 'Twilight' saga.
WHO: Hugh Hefner. AGE: Turns 85. WHEN: April 9. KNOWN FOR: Being the oldest ever playboy and for making a fortune out of exposing beautiful women.
WHO: Mandy Moore. AGE: Turns 27. WHEN: April 10. KNOWN FOR: Starting out in the Pop league of Britney and Christina but changing fields to emerge as a strong actress in her own right, and out-classing her once greatest rivals.
WHO: Seth Rogen. AGE: Turns 29. WHEN: April 5. KNOWN FOR: Taking the comedy film world by storm with memorable movie hits such as 'Knocked Up,' 'Superbad,' and 'Step Brothers.'
WHO: Cynthia Nixon. AGE: Turns 45. WHEN: April 9. KNOWN FOR: Playing fiery red-head Miranda on 'Sex and The City.' Oh how we miss that witty cynicism!
WHO: Adrien Brody. AGE: Turns 38. WHEN: April 14. KNOWN FOR: His nimble fingers and unforgettable performance in 'The Pianist.'
Jason Merritt/Getty Images
WHO: Sarah Michelle Gellar. AGE: Turns 34. WHEN: April 14. KNOWN FOR: Kicking serious vampire butt in the cult TV show 'Buffy the Vampire Slayer.'
WHO: Ed O'Neill. AGE: Turns 65 WHEN: April 12. KNOWN FOR: Playing Al Bundy on 'Married...With Children' for ten years- how could we forget?!
WHO: Leighton Meester. AGE: Turns 25. WHEN: April 9. KNOWN FOR: Playing Serena's greatest and most self-importnant frenemie, Blair Waldorf, on 'Gossip Girl.'
WHO: Claire Danes. AGE: Turns 32. WHEN: April 12. KNOWN FOR: Her screen debut as Beth on 'Little Women,' but also for her onscreen chemistry with Leonardo Dicaprio in 'Romeo and Juliet.'
Dario Cantatore/Getty Images
WHO: Haley Joel Osment. AGE: Turns 23. WHEN: April 10. KNOWN FOR: Seeing dead people in 'The Sixth Sense.'
WHO: Brooklyn Decker. AGE: Turns 24. WHEN: April 12. KNOWN FOR: Her Sports Illustrated bikini body.
Rick Diamond/ACMA2011/Getty Images
WHO: Jenna Jameson. AGE: Turns 37. WHEN: April 9. KNOWN FOR: That shall not be repeated.
WHO: Jesse McCartney. AGE: Turns 24. WHEN: April 9. KNOWN FOR: Liking girls with a 'Beautifiul Soul.'
WHO: Joss Stone. AGE: Turns 24. WHEN: April 11. KNOWN FOR: Giving the 'soul' genre of music a brand spanking new image. And for that voice, oh that voice!
WHO: Shannon Doherty. AGE: Turns 40. WHEN: April 12. KNOWN FOR: Just five digits... 90210.