Bill Hader is a master impressionist, we all know it. Here are some of his performances which are absolutely impeccable and funny.

0:00 Alan Alda
0:36 John Malkovich
1:02 James Mason
1:44 Henry Winkler
2:06 Jabba The Hutt
2:20 Seth Rogen
2:53 Jack Nicholson
3:14 Bob Simon
3:47 Keith Morrison
4:11 Fred Armisen
4:52 Harvey Fierstein
5:18 Jason Sudeikis
5:46 Arnold Schwarzenegger
6:49 Al Pacino