Teen star Ashley Olsen is such a great fan of Julia Roberts that she stood in line to meet her idol at a charity event.

"She was so excited to meet her. She just stood there waiting for Julia. She was like a little girl," a source told the New York Post about the 18-year-old "Full House" star.

Julia, who has temporarily retired from movies after giving birth to twins, had attended a money-raising function by the Hole in the Wall Gang - a group that works for seriously ill children.