Bil Hader Info - Born on June 7, 1978 - about a month younger than me!

Recurring SNL characters (according to Wikipedia.com!)
Vinny Vedecci, the Italian talk-show host whose guests cannot speak Italian
Nitro (along with Andy Samberg's Admiral Spaceship) in the SNL Digital Short Laser Cats
One of the four guys (the others being Will Forte, Jason Sudeikis and the host) who reveal crazy aspects about themselves while singing a song on the jukebox in the Song Memories sketches.
One half of the Same Sex Couple from New Jersey (or Connecticut), the other half played by Fred Armisen
DJ Frontal Assault on Deep House Dish
Danny, a guy who has the mutant Kuato (played by Andy Samberg) living in his stomach
Mike Underballs, the director of PSA's who has to deal with the shenanigans of Jeff (Jason Sudeikis), a crew member.
Starring in the SNL skit, Taco Town with Andy Samberg and Jason Sudeikis.

Impersonations
Colonel Sanders
Steven Seagal
Al Pacino
Mahmoud Ahmadinejad
John Mark Karr
Michael Richards (as Cosmo Kramer)
Peter Falk (as Columbo)
James Mason
Peter Gallagher
Peter O'Toole
Daniel Radcliffe
Gregory Peck
Brian Grazer
Captain Hook
John Mayer
Tony Blair
Stuart Torevell
Ryan Seacrest
Jerry Seinfeld
Tim McCarver
Vincent Price (in the TVLand Variety Vault sketches)
Alvin the chipmunk
Animal from The Muppets
Chris Dodd
Daniel Day-Lewis (as Daniel Plainview from There Will Be Blood)
Tim Gunn
Eliot Spitzer
Hader has said he did impressions of teachers and friends when he was growing up, but did not do impressions of famous people until his Saturday Night Live audition [1]. His Al Pacino impression came after watching the actor's Emmy acceptance speech for Angels in America. Hader's Vincent Price impression came from his love of Price's Edgar Allan Poe films, such as The Fall of the House of Usher. His Peter O'Toole impression came partly from O'Toole in My Favorite Year and Jack Lemmon's drunken Prince Hapnick from The Great Race.