 O'Keefe resides in Los Angeles.His brothers are Broadway and movie songwriter Laurence O'Keefe (also called Larry) (composer and lyricist of shows like "" and "") and "Seinfeld" writer and producer Daniel O'Keefe (also called Danny).Their father, Daniel O'Keefe, Sr., invented their private family holiday Festivus, which gained national exposure when depicted in an episode of "Seinfeld" (written by Danny), and which is now celebrated across the globe.