Mr. T was 27 in The Blues Brothers when he played the character 'Guy on Street (uncredited)'.
That was over 44 years ago in 1980.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 72, and has starred in 32 movies in total, 31 of those since The Blues Brothers was released.
In The Blues Brothers, I think Mr. T looks: