Kate Morton (also Mitchell) is a fictional character from the BBC soap opera EastEnders, played by Jill Halfpenny.

Kate assists her boss, Jill Marsden (Sophie Stanton), and DI Dominic Price (Paul Brennen), orchestrate a strategic honey trap, hoping Phil will confess to murdering his ex-girlfriend Lisa Fowler (Lucy Benjamin).

Soon afterwards, Kate receives a directive to probe into the Imperial Room nightclub, owned by the square's reigning crime kingpin, Jack Dalton (Hywel Bennett).

He dispatches his employee, George Peters (Andy Beckwith), to carry out a sinister plan involving the heinous acts of rape and murder at Kate's residence.

On their wedding day, however, she is troubled by the presence of her alcoholic father, Geoff (Maurice Roëves), specifically when he openly dislikes Phil, until the pair make up for Kate's sake.

However, Lisa is unhappy that Louise lives with Phil and she plans to reclaim their daughter with the help of his arch-enemy and Dennis' father, Den Watts (Leslie Grantham).

In 2004, Kate makes friends with Little Mo Mitchell (Kacey Ainsworth) after being the first person to learn that she had been raped by Graham Foster (Alex McSweeney), a man frequenting the Queen Vic.

Kate soon establishes a business partnership with Den's wife, Chrissie (Tracy-Ann Oberman), as she turns out to also be a professional hairdresser.

Later, Kate is offered a job in the police department; she accepts it, closes the salon, and leaves Walford for Brighton, where she starts anew.

Jo Atkinson from the Western Mail discussed the Kate/Phil/Marsden storyline, saying, "Betrayal with a capital B is the order of the day in the Square this week.