Jason Costello (previously Jasmine Costello) is a fictional character from the British Channel 4 soap opera, Hollyoaks, played by Victoria Atkin. The character debuted on-screen during the episode airing on 2 August 2010 and was introduced by series producer Paul Marquess as a member of the yet to be established Costello family. Jason is a transgender boy, and the first character in the soap opera to experience gender dysphoria. Originally introduced as Jasmine, the character eventually reveals that he wishes to be known as Jason, and legally changes his name. Jason's storyline prominently explores the secrecy and trials of his romantic relationship with Bart McQueen (Jonny Clarke), a straight character who originally developed an attraction to Jason as Jasmine. Jason departed from Hollyoaks on 1 December 2011.