Today is Sasha Pieterse's 19th birthday! The Pretty Little Liars star is the youngest cast member on the show, but we've known her longer than most of the PLL girls – after all, she was in the 2005 movie The Adventures of Sharkboy and Lavagirl 3-D! It's hard to believe that the film came out 10 years ago and that Sasha was only 9 years old at the time.
Click through the gallery to see what the cast of the movie looks like now, then let us know who you think looks the most different in the comments below. Do you still love watching Sharkboy and Lavagirl?