Bill Bailey (born Mark Bailey) is an English actor, musician and comedian who portrayed Droxil in The Doctor, the Widow and the Wardrobe. Bailey is perhaps best known for co-starring in the sitcom Black Books. He also appeared in Spaced, which features several references to Doctor Who.
As a stand up comedian, he has performed a comedic version of the Doctor Who Theme called "Doctor Qui" which is performed in the style of Belgian Jazz with French lyrics. He first performed it on Is it Bill Bailey? in 1998 and has since performed it on several other TV programmes.