Christopher Mark Sievey (25 August 1955 – 21 June 2010) was an English musician and comedian known for fronting the band The Freshies in the late 1970s and early 1980s and for his comic persona Frank Sidebottom from 1984 onwards.

Sievey, under the guise of Sidebottom, made regular appearances on North West television throughout the late 1980s and early 1990s, even becoming a reporter for Granada Reports. More recently he had presented Frank Sidebottom's Proper Telly Show in B/W for the Manchester-based television station Channel M. Throughout his career, Sidebottom made appearances on radio stations such as Manchester's Piccadilly Radio and on BBC Radio 1 and BBC Radio 5, alongside Mark and Lard.