Gillian Jephcott appeared on Coronation Street in two roles: firstly in August 2001 as Carol Glover, a harsh and uncaring officer at Barnhurst Prison who "looked after" the incarcerated Hayley Cropper when she was accused of kidnapping abused foster child Wayne Hayes; and she returned to the programme between November 2023 and January 2024 as Caitlin Edwards, a child protection officer conducting an investigation into the welfare of Joseph Brown.
She has also appeared in Heartbeat, Hollyoaks and Clocking Off as well as several episodes of Emmerdale in both 2000 and 2004 as Faith, one of the extended Dingle clan.
On stage, she has appeared in I Want That Hair in a widely praised performance, and Derek.