Mongrels, formerly known under the working titles of We Are Mongrels and The Un-Natural World, is a British puppet-based situation comedy series first broadcast on BBC Three between 22 June and 10 August 2010, with a making-of documentary entitled "Mongrels Uncovered" broadcast on 11 August 2010. A second series of Mongrels began airing on 7 November 2011.

The series revolves around the lives of five anthropomorphic animals who hang around the back of a pub in Millwall, the Isle of Dogs, London. The characters are Nelson, a metrosexual fox; Destiny, an Afghan hound; Marion, a "borderline-retarded" cat; Kali, a grudge-bearing pigeon; and Vince, Nelson's friend, a sociopathic foul-mouthed fox.