Cambridge Arts Theatre is a 666-seat theatre on Peas Hill and St Edward's Passage in central Cambridge, England. The theatre presents a varied mix of drama, dance, opera and pantomime. It attracts touring productions, as well as many shows direct from, or prior to, seasons in the West End. Its annual Christmas pantomime is an established tradition in the city. From 1969 to 1985, the theatre was also home to the Cambridge Theatre Company, a national touring company. The Cambridge Arts Theatre was founded in 1936 by the Cambridge economist and statesman John Maynard Keynes.

Lydia Lopokova, Baroness Keynes was a Russian ballerina famous during the early 20th century.