William "Billy" Connolly, CBE (born 24 November 1942) is a Scottish comedian, musician, presenter and actor. He is sometimes known, especially in his native Scotland, by the nickname "The Big Yin" ("The Big One"). His first trade, in the early 1960s, was as a welder (specifically a boilermaker) in the Glasgow shipyards, but he gave it up towards the end of the decade to pursue a career as a folk singer in The Humblebums and subsequently as a soloist. In the early 1970s, he made the transition from folk-singer with a comedic persona to full-fledged comedian.

Connolly is also an actor and has appeared in such films as Water (1985); Indecent Proposal (1993); Muppet Treasure Island (1996); Mrs. Brown (1997), for which he was nominated for a BAFTA; The Boondock Saints (1999); The Man Who Sued God (2001); The Last Samurai (2003); Timeline (2003); Lemony Snicket's A Series of Unfortunate Events (2004); Garfield: A Tail of Two Kitties (2006); Open Season (2006); The X-Files: I Want to Believe (2008); and Open Season 2 (2008). Connolly reprised his role as Noah "Il Duce" MacManus in The Boondock Saints II: All Saints Day. Connolly appears as the King of Lilliput in the 2010 remake of Gulliver's Travels. Connolly provides the voice for King Fergus in Pixar's Brave (2012).