David Threlfall (born 12 October 1953) is an English stage, film and television actor and director. He is best known for playing Frank Gallagher in Channel 4's series Shameless. He has also directed several episodes of the show. In April 2014, he portrayed comedian Tommy Cooper in a television film entitled Tommy Cooper: Not Like That, Like This. In 2014, he starred alongside Jude Law in the thriller Black Sea.