Darren Criss was 21 in A Very Potter Musical when he played the character 'Harry Potter'.
That was over 15 years ago in 2009.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 37, and has starred in 31 movies in total, 30 of those since A Very Potter Musical was released.
In A Very Potter Musical, I think Darren Criss looks: