"Bad Sisters" is an adaptation of the Belgian show "Clan"
Some of the lead actors have famous Irish family members. Sharon Horgan (Eva) is a sister of former Irish rugby player Shane Horgan. Eve Hewson (Becka) is the daughter of U2's Bono. Brian Gleeson (Thomas) is a son of actor Brendan Gleeson and brother of actor Domhnall Gleeson.
Brian Gleeson and Sarah Greene were both in the 2021 television series "Frank of Ireland" (2021).
Brian Gleeson and Peter Coonan previously starred together in Irish drama series "Love/Hate."