Louis Szekely (born September 12, 1967), known professionally as Louis C.K. (and sometimes Louie C.K.), is an American stand-up comedian, Emmy-winning television and film writer, actor, producer and director from Boston, Massachusetts. He currently stars in the FX comedy series Louie, which he also writes, directs and edits.

His credits as a writer include Late Show with David Letterman, Late Night with Conan O'Brien, The Dana Carvey Show and the Chris Rock Show. His work for the Chris Rock Show was nominated for an Emmy Award three times, including winning "Best Writing in a Variety or Comedy Series" in 1999. He was also nominated for an Emmy Award for his work writing Late Night with Conan O'Brien. However, the feature film born from the Chris Rock sketches, Pootie Tang, which C.K. wrote and directed, received largely negative reviews by critics but became an instant cult classic. He was nominated for an Emmy Award for writing on his 2008 special, Chewed Up.

C.K. has co-written two screenplays with Chris Rock, Down to Earth in 2001, and I Think I Love My Wife in 2007.

Source: wikipedia.com