Mark Robert Bailey, known professionally as Bill Bailey, is an English musician, comedian, actor and television presenter. He is known for his role as Manny in the sitcom Black Books and for his regular appearances on the panel shows Never Mind the Buzzcocks, Have I Got News for You, and QI, as well as for his stand-up comedy work. He plays a variety of musical instruments and incorporates music into his performances.

Black Books is a British sitcom created by Dylan Moran and Graham Linehan, and written by Moran, Kevin Cecil, Andy Riley, Linehan and Arthur Mathews. It was broadcast on Channel 4, running for three series from 2000 to 2004. Starring Dylan Moran as Bernard Black, Bill Bailey as Manny Bianco, and Tamsin Greig as Fran Katzenjammer, the series is set in the eponymous London bookshop and follows the lives of its owner, his assistant, and their friend. The series was produced by Big Talk Productions, in association with Channel 4.