Startraksphoto; Sipa; FilmMagic (2)
April 09, 2012

It's a big day for Hollywood birthdays! Kristen Stewart celebrates her 22nd today, Leighton Meester turns 26, Elle Fanning blows out 14 candles, and Cynthia Nixon rings in her 46th. Congratulations to these Aries ladies!

Plus, celebrate Kristen Stewart's birthday by clicking through her transformation!

MORE:Cynthia Nixon's TransformationElle Fanning's New Red HairLeighton Meester's Transformation