KCS Theatre Company is the in-house company of King's College School, Wimbledon. It was founded  for the school's production of Pirandello's Man, Beast and Virtue,
which went to C Venue on Prince's St in Edinburgh for the 1993 Edinburgh Festival.

King's College School is a London independent day school for boys, beautifully set on the edge of Wimbledon Common. The School was originally part of London University's King's College  on the Strand and moved to Wimbledon in 1896. It has a fine reputation as one of the most successful academic schools in the country. In 1996 KCS Theatre Company was engaged by West End producers Guy Chapman and Paul Spyker to perform John Logan's Never the Sinner (which they had seen the company  perform in Edinburgh) in the Arts Theatre in London's West End. The Company's successful three week run entered the record books as being the only school play ever to have been performed commercially in the West End!

The School's main house theatre is Collyer Hall Theatre, which was opened in 1989. It has a full-time manager, Toby Alloway, and very high technical specifications. The Theatre Company performs a varied programme every year, ranging from Greek Tragedy to American Musicals. The workshop studio (Studio Q2) is for small scale productions and experimental theatre. The boys are encouraged to write and direct their own plays. With all theatre at KCS there is a distinctively professional approach to production. The process of reheasal is intensive and demanding. Consequently, the standard of performance is very high, which explains the extraordinary success of the Company in Edinburgh.