Katherine Louisa Ryan (born 30 June 1983) is a Canadian comedian, writer, presenter, and actress based in the UK.
She has appeared on British panel shows including Mock the Week, Never Mind the Buzzcocks, A League of Their Own, 8 Out of 10 Cats, Would I Lie to You?, QI, Just a Minute, Safeword, and Have I Got News for You.
In 2015, she replaced Steve Jones as the presenter of Hair on BBC Two.
As an actress, she has appeared in Channel 4 sitcom Campus, BBC Two sitcom Episodes and BBC3 sitcom Badults.
As a stand-up comedian, Ryan has appeared on the BBC's Live at the Apollo, both as a featured act and as a lead act.
For her work, she won the Nivea Funny Women Award, and was also runner-up in the Amused Moose Laugh-Off competition in 2008.
In February 2017, Netflix released Katherine Ryan: In Trouble.
In July 2019, Netflix released her second live stand-up special, Katherine Ryan: Glitter Room.