Kirsty “Dotty” Cotton is a fictional character from the BBC soap opera EastEnders, played by Molly Conlin from 2008 to 2010 and Milly Zero since 2019. She was introduced on 26 December 2008 as the daughter of established character Nick Cotton (John Altman). Dotty was used as Nick's partner in crime, as the duo planned to kill her grandmother Dot Branning (June Brown) and inherit the money from her will. She and Dot subsequently became friends after Nick's failed murder attempt, due to Dotty sabotaging their murder plan at the last minute. In her final storyline, airing on 23 February 2010, she left with her mother Sandy (Caroline Pegg), who she believed died. On 3 October 2019, Dotty returned, with the role recast to Milly Zero.