The host welcomes another batch of celebrity guests to his famous green room for a special Christmas edition of the talk show. He is joined by David Tennant, whose demonic role in Terry Pratchett and Neil Gaiman's Good Omens will be coming to BBC in ... (more)the new year, as well as singers Rita Ora and Jamie Cullum, former X Factor judge Sharon Osbourne, Strictly Come Dancing: It Takes Two presenter Rylan Clark-Neal, award-winning Hollywood star David Oyelowo and comedian Bec Hill.