Cillian Murphy was 21 in Sweety Barrett when he played the character 'Pat the Barman'.
That was over 25 years ago in 1999.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 47, and has starred in 62 movies in total, 58 of those since Sweety Barrett was released.
In Sweety Barrett, I think Cillian Murphy looks: