Known for department
Michael Ian Black (born Michael Ian Schwartz; August 12, 1971) is an American comedian, actor, writer and director. He has starred in several TV comedy series, including The State, Ed, Viva Variety, Stella and Michael & Michael Have Issues. He is also a prominent poker player, appearing on Celebrity Poker Showdown several times. He released a well-received children's book, Chicken Cheeks, in 2009. Description above from the Wikipedia article Michael Ian Black, licensed under CC-BY-SA, full list of contributors on Wikipedia.
Stephen Hawking (segment "In the Woods Segments")