Ben Affleck was 18 in Buffy the Vampire Slayer when he played the character 'Basketball Player #10 (uncredited)'.
That was over 32 years ago in 1992.
Today he is 51, and has starred in 91 movies in total, 80 of those since Buffy the Vampire Slayer was released.
In Buffy the Vampire Slayer, I think Ben Affleck looks: