Adam Sandler. Adam Sandler was 47 in The Improv: 50 Years Behind the Brick Wall as 'Narrator (voice)'.
Budd Friedman. Budd Friedman was >> in The Improv: 50 Years Behind the Brick Wall as 'Self'.
Judd Apatow. Judd Apatow was 46 in The Improv: 50 Years Behind the Brick Wall as 'Self'.
Richard Belzer. Richard Belzer was 69 in The Improv: 50 Years Behind the Brick Wall as 'Self'.
Lewis Black. Lewis Black was 65 in The Improv: 50 Years Behind the Brick Wall as 'Self'.
Russell Brand. Russell Brand was 38 in The Improv: 50 Years Behind the Brick Wall as 'Self'.
George Carlin. George Carlin would have been no older than 71 in The Improv: 50 Years Behind the Brick Wall as 'Self (archive footage)'.
Billy Crystal. Billy Crystal was 65 in The Improv: 50 Years Behind the Brick Wall as 'Self'.
Rodney Dangerfield. Rodney Dangerfield would have been no older than 82 in The Improv: 50 Years Behind the Brick Wall as 'Self (archive footage)'.
Larry David. Larry David was 66 in The Improv: 50 Years Behind the Brick Wall as 'Self'.
Jimmy Fallon. Jimmy Fallon was 39 in The Improv: 50 Years Behind the Brick Wall as 'Self'.
Kathy Griffin. Kathy Griffin was 53 in The Improv: 50 Years Behind the Brick Wall as 'Self'.
Jim Carrey. Jim Carrey was 51 in The Improv: 50 Years Behind the Brick Wall as 'Self'.
Ken Fuhr. Ken Fuhr was >> in The Improv: 50 Years Behind the Brick Wall as 'Cinematography'