Louis Szekely , 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.

He has performed his stand-up frequently on shows like Late Show with David Letterman, Late Night with Conan O'Brien, Lopez Tonight, The Tonight Show with Jay Leno, and Jimmy Kimmel Live. In August 2005, C.K. starred in a half-hour HBO special as part of the stand-up series One Night Stand.