John Sessions, born John Marshall, was a British actor and comedian. He was known as a regular performer on comedy improvisation show Whose Line Is It Anyway?, as co-creator, co-writer and co-star of the sitcom Stella Street, as a panellist on QI, and as a character actor in numerous films, both in the UK and Hollywood.

Stella Street is a British television comedy programme, originally screened in four series on BBC Two between 22 December 1997 and 11 December 2001. It takes the form of a mockumentary filmed on a camcorder, based on the fantastical premise that a group of British and American celebrities have all decided to move into Stella Street in Surbiton.