Katy Armstrong is a fictional character from the British television soap opera, Coronation Street, played by Georgia May Foote. She made her first screen appearance during the episode broadcast on 30 July 2010. Foote had previously appeared in the soap in January that same year as Jess Burrows. Katy is Owen Armstrong's (Ian Puleston-Davies) youngest daughter and Izzy Armstrong's (Cherylee Houston) sister. Her storylines have mostly revolved around her relationship with Chesney Brown (Sam Aston), becoming a mother to their son, Joseph and beginning an affair with Ryan Connor (Sol Heras). Foote's departure from the show was announced in April 2014, with her having filmed her final scenes on 16 February 2015 and departed on 20 March 2015.