Peter Farrelly and Bobby Farrelly, collectively referred to as the Farrelly brothers, are American screenwriters and directors. They have made eleven films together, including Dumb and Dumber, Outside Providence, and There's Something About Mary.

Peter John Farrelly is an American film director, screenwriter, producer and novelist. Along with his brother Bobby, the Farrelly brothers are mostly famous for directing and producing quirky comedy and romantic comedy films such as Dumb and Dumber; Outside Providence; Shallow Hal; Me, Myself and Irene; There's Something About Mary; and the 2007 remake of The Heartbreak Kid.