Catherine Kellner (born October 2, 1970) is an American character actress, perhaps best known for appearing in Daft Punk's music-video for their song Da Funk.

Catherine Kellner was born in Manhattan, New York to a psychologist/photographer mother and a squash player/Greek classics scholar father who was a Hungarian immigrant. She attended New York University's Graduate Acting Program at the Tisch School of the Arts, graduating in 1995. She currently resides in New York City.

She currently lives in New York City and is married to Reuben Avery, a photographer and computer programmer, and has a son Ewen Joseph Avery. Her parents are George and Martha Kellner, who, in May 1970, survived the crash of ALM Flight 980 in the Caribbean. Martha Kellner was pregnant with Catherine at the time.