<Tr> <Th> Sons </Th> <Td> Joseph Brown </Td> </Tr> <Tr> <Th> Nephews </Th> <Td> Jake Windass </Td> </Tr> <P> Katy Armstrong is a fictional character from the British ITV 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 . Katy was killed off - screen in a car accident on 18 October 2017 . </P> <P> Katy attends Chesney Brown's (Sam Aston) birthday party with her sister, Izzy (Cherylee Houston); she and Chesney get drunk and ride Izzy's wheelchair around the street but are caught by Katy's father, Owen (Ian Puleston - Davies). Chesney invites Katy to Roy (David Neilson) and Hayley Cropper's (Julie Hesmondhalgh) wedding reception and they soon become close . She opens up to him about her mother, who could not deal with Izzy's disability and walked out on the family, as a result . Owen takes an aversion to Katy's growing bond with Chesney, and Katy uses Izzy to cover for her when she and Chesney sleep together . When Owen finds out what has happened, he and Katy argue, and she decides to leave home . The couple soon realise that they cannot afford their own flat but Katy moves in with Chesney at 5 Coronation Street . A few months later, Chesney and Katy rent a flat on Victoria Street . </P>

Who plays izzy's mum in coronation street