Peter John Farrelly (born December 17, 1956) is an American film director, screenwriter, producer and novelist.

He studied writing for a time at UMass Amherst, but was ultimately dissatisfied with the program, and transferred to Columbia University in New York City, which Farrelly said he found very satisfying.

[11] Together with his brother, Bobby Farrelly, he has written, directed, and produced several comedy films including There's Something About Mary,[12] Dumb and Dumber,[13] Kingpin,[14] Shallow Hal,[15][16] Me, Myself & Irene,[17] Stuck on You,[18] and Fever Pitch.

[13][20] In 2006, Farrelly directed the Man Laws series of television commercials for the Miller Lite beer brand, which featured actor Burt Reynolds, American football player Jerome Bettis, climber Aron Ralston, and professional wrestler Triple H.[21] Peter worked on a film entitled, Movie 43, which was released in 2013 and produced by the siblings' long-time producer Charles B. Wessler.

[29][30] In 2016, Audience announced that Loudermilk, a new half-hour scripted comedy co-created by Farrelly and Bobby Mort, would receive a straight-to-series order.

[32][33] In 2018, Farrelly directed Green Book, which won the Toronto International Film Festival's People Choice Award.

In 2020, Farrelly directed alongside his brother, and co-wrote the Quibi comedy series The Now, starring Bill Murray,[35][36] Dave Franco, O'Shea Jackson Jr., Daryl Hannah, and Jimmy Tatro.

[46] In 2019 after the story resurfaced, Farrelly stated: "I did this decades ago, and I thought I was being funny, and the truth is I'm embarrassed, and it makes me cringe now.