The puppet sitcom revolves around the lives of five talking animals who meet outside of a London pub.
Dan Tetsell, who provides the voice of Marion the cat, made the announcement on his Twitter feed.
He confirmed: "Mongrels has got a second series."
The first series featured the voices of Katy Brand and Paul Kaye as well as guest appearances from Clive Anderson, Christopher Biggins and Eamonn Holmes. The final episode aired on August 11.
The programme was previously accused of plagiarism by writer Brian West.