Mae Whitman was 23 in The Perks of Being a Wallflower when she played the character 'Mary Elizabeth'.
That was over 12 years ago in 2012.
Today she is 35, and has starred in 69 movies in total, 31 of those since The Perks of Being a Wallflower was released.
In The Perks of Being a Wallflower, I think Mae Whitman looks: