Mantzoukas will appear in the comedy’s current season as a fashion designer who becomes the boyfriend of Haley (Sarah Hyland), reports Entertainment Weekly.
Mantzoukas is well known for his recurring role in The League as Rafi and for starring in The Dictator alongside Sacha Baron Cohen.
Paul Scheer – who stars alongside Mantzoukas in The League – has also signed up for a role on Modern Family this season playing a Costco manager who crosses paths with Gloria (Sofia Vergara) and Claire (Julie Bowen).
Other stars appearing in the comedy’s fourth season include Matthew Broderick and Shelley Long who is reprising her role as the ex-wife of Jay (Ed O’Neill).
Modern Family airs on Wednesdays at 9/8c on ABC, and Fridays at 8pm on Sky1 in the UK.