Leigh Izaak Francis, who is often known by the name of a character he plays, Keith Lemon, is an English television presenter, actor, writer, and comedian. He is best known for creating and starring in Channel 4's sketch comedy show Bo' Selecta! (2002–2009) and presenting the ITV shows Celebrity Juice (2008–2022) and Through the Keyhole (2013–2019). His other comedy shows include Lemon La Vida Loca (2012–2013), The Keith Lemon Sketch Show (2015–2016), and The Keith & Paddy Picture Show (2017–2018).

Bo' Selecta! is a British television sketch show written and performed by Leigh Francis. It was broadcast on Channel 4 from 2002 until 2009 and lampooned popular culture, becoming known for its often surreal, abstract toilet humour. Season 4 was known as A Bear's Tail while season 5 shifted filming to the United States and was called Bo! In the USA. The show consists of comedy sketches of characters played by Francis, with minor support roles over the years played by Craig Phillips, Caroline Flack, Ozzy Rezat, Patsy Kensit, Karen Hayley, Barunka O'Shaughnessy, Dexter Fletcher, Sean Pertwee, Luis Fernandez-Gil and Robert Stone.