William Francis Nighy (; born 12 December 1949) is an English actor.
Nighy became widely known for his performance as Billy Mack in Love Actually (2003). Other notable roles in cinema include his portrayal of Davy Jones in the Pirates of the Caribbean film series, and Viktor in the Underworld film series. He is also known for his roles in the films Still Crazy (1998), Shaun of the Dead (2004), The Hitchhiker's Guide to the Galaxy (2005), The Constant Gardener (2005), Notes on a Scandal (2006), Hot Fuzz (2007), Valkyrie (2008), The Boat That Rocked (2009), Harry Potter and the Deathly Hallows – Part 1 (2010), voicing Grandsanta in Arthur Christmas (2011), The Best Exotic Marigold Hotel (2012), About Time (2013) and Turks & Caicos (2014). His performances were also acclaimed in the BBC One series State of Play and in the TV films The Girl in the Café, Gideon's Daughter and Page Eight, for which he earned Golden Globe nominations, winning one for Gideon's Daughter.
In 2015, Nighy appeared on Broadway with Carey Mulligan in the acclaimed revival of Skylight and received a Tony Award nomination for Best Actor in a Play.