Simon John Blackwell (born 27 May 1966) is an English comedy writer and producer. He is best known for his work on The Thick of It, In The Loop and Veep, and for his collaborations with Jesse Armstrong and Sam Bain on Peep Show, Four Lions and The Old Guys. Blackwell is the creator of the comedy series Back, starring David Mitchell and Robert Webb, as well as Breeders, starring Martin Freeman and Daisy Haggard.