Jason 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.

Bart McQueen is a fictional character from the British Channel 4 soap opera Hollyoaks, played by Jonny Clarke. He first appeared onscreen at his stepmother's funeral in August 2010, introduced by producer Paul Marquess as a member of the McQueen family. During his time on the show, Bart had been involved in: relationships with Jason Costello and Sinead O'Connor, being stabbed during the third series of Hollyoaks Later, his involvement in Esther Bloom's bullying storyline, causing the bus crash featuring in the notable Enjoy the Ride storyline, and falling off the rails with a growing cannabis habit.