Elliott Tittensor, identical twin brother of Luke Tittensor (who plays Daz Eden in Emmerdale), took over the part of Carl on Shameless when Luke was no longer available because of the Emmerdale filming schedules.
Mark Mylod directed the first episode of both Shameless shows, the British one and its American remake.
The role of Frank was originally given to Sean Gallagher, but then it was thought he was too young to play the character. It cost makers Company Pictures £100,000 to re-shoot the scenes already filmed with David Threlfall as the replacement.
At least one Daft Punk song has been played in each series.