John Hannah (born 23 April 1962) is a Scottish actor and narrator. He came to prominence in Four Weddings and a Funeral (1994), for which he was nominated for the BAFTA Award for Best Actor in a Supporting Role as Matthew. His other film appearances include Sliding Doors (1998), The Hurricane (1999), and The Mummy trilogy (1999–2008).

His television roles include Dr Iain McCallum in McCallum (1995–1998); the title character in Rebus (2000–2001); Jack Roper in New Street Law (2006–2007); Jake Osbourne in Cold Blood (2007–2008), Quintus Lentulus Batiatus in Spartacus (2010–2011), Jack Cloth in A Touch of Cloth (2012–2014), Jason's father (Aeson) in the BBC series Atlantis (2013–2015), and Dr. Holden Radcliffe in Agents of S.H.I.E.L.D. (2016–2017).