Alec Baldwin was 25 in The Sheriff and the Astronaut when he played the character 'Sheriff Ed Cassaday'.
That was over 40 years ago in 1984.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 65, and has starred in 176 movies in total, 171 of those since The Sheriff and the Astronaut was released.
In The Sheriff and the Astronaut, I think Alec Baldwin looks: