Millie Inbetween is a British children's sitcom series broadcast on CBBC and starring Millie Innes. The first episode premiered on 1 October 2014, with the final episode airing on 12 December 2018. It focuses on 12-year-old Millie and her 15-year-old sister whose parents have recently split up. In August 2019, Richard Wisker confirmed that he, Tallulah Greive and Theo Stevenson would reprise their roles from Millie Inbetween in an iPlayer sitcom Flatmates, aimed at an older audience.