James Avery was 42 when he first played the role of Uncle Phil in The Fresh Prince of Bel-Air. Just let that sink in for a while.

Feeling old yet? Maybe this will work. Stephen Fry was 32 when he played General Melchett in Blackadder Goes Forth.

Maybe it makes you feel old, maybe it just tells you what was on TV when I was at an impressionable age :)