Christopher Mintz-Plasse was 22 in Movie 43 when he played the character 'Mikey (segment "Middleschool Date")'.
That was over 11 years ago in 2013.
Today he is 34, and has starred in 34 movies in total, 18 of those since Movie 43 was released.
In Movie 43, I think Christopher Mintz-Plasse looks: