Katie is not seen or mentioned again until the eleventh and final series, where Frank is seen pulling faces at a young girl on the bus. The girl then leaves the bus and straight into the arms of Lip, revealing that she was Katie. Katie, now 9 years old, is excited to see Frank, after being informed by Lip that he had been captured by the Taliban. She instantly gets on well with her aunt, Stella Gallagher (Nikita Brownlee), who is three years her junior. Due to lacking a mother figure in her life since Mandy's death, Katie dresses like a boy and always has her hair tied back, which confuses Mimi, who attempts to persuade Katie to wear dresses. Lip and Frank both tell Katie that she does not need to do anything that makes her feel uncomfortable, so she stops wearing dresses. Katie flees when Lip is beaten up in an alleyway, and shortly after this, Lip and Katie leave Chatsworth again to continue their lives as before.