Diane Morgan (born 5 October 1975) is an English actress, comedian and writer. She is notable for portraying Philomena Cunk on the review programme Charlie Brooker's Weekly Wipe (2013–2020), the mockumentary series Cunk on Britain (2018), Cunk on Earth (2022), and the extended special Cunk on Life (2024).

She also played Liz on the BBC Two sitcom Motherland (2016–2022) and Kath in the Netflix dark comedy series After Life (2019–2022), as well as writing and starring in the BBC Two comedy series Mandy (2019–present).