Owen Teale was 22 in Doctor Who: Vengeance on Varos when he played the character 'Maldak'.
That was over 39 years ago in 1985.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 63, and has starred in 30 movies in total, 28 of those since Doctor Who: Vengeance on Varos was released.
In Doctor Who: Vengeance on Varos, I think Owen Teale looks: