For half their lives, Emma Kenney and Ethan Cutkosky have been Gallaghers. The duo were both only 10 when cast on Shameless as Debbie and Carl, the two youngest siblings (aside from baby Liam) in TV's most dysfunctional family. Now, 11 seasons, five Liams, and one unforgettable run later, the 21-year-olds are all grown up and preparing for the end of an era — and whatever comes next.