Through the Keyhole is a British comedy panel game show created by the TV producer Kevin Sim and originally presented by Sir David Frost in the studio and Loyd Grossman on location. The location presenter goes around celebrities' houses and a panel of other celebrities in the studio try to guess who the famous homeowner is.

The show was originally produced by Yorkshire Television and was broadcast on ITV from 3 April 1987 to 1 May 1995, then on Sky One from 22 February to 23 December 1996 before moving to BBC One from 5 May 1998 to 2004 and its sister channel BBC Two from 26 February 2006 to 4 June 2008.

In 2013, the show was revived for ITV with Leigh Francis as the host. In February 2020, it was reported that the programme had been cancelled after six series.