Two thousand eleven will mean big celebrations for these famous faces who are all grown up and turning 25 this year! Twilight's Robert Pattinson will ring in the big 2-5 in May, while fashion powerhouses Mary-Kate and Ashley Olsen share June birthdays with big-screen success Shia LaBeouf. Gossip Girl's star Leighton Meester's looking forward to an April bash and many members of the cast of Glee are hitting the same milestone. We've already taken a look at all the big names facing 30; now click through to see who's prepping to blow out their 25th b-day candles!
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