Taron Egerton was 23 in Testament of Youth when he played the character 'Edward Brittain'.
That was over 10 years ago in 2014.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 34, and has starred in 19 movies in total, 14 of those since Testament of Youth was released.
In Testament of Youth, I think Taron Egerton looks: