The Gillian Lynne Theatre is a West End theatre located on the corner of Drury Lane and Parker Street in Covent Garden, in the London Borough of Camden. A new production of the musical Crazy For You is scheduled to the Gillian Lynne Theatre for a limited 30-week West End engagement beginning 24 June 2023, prior to an official opening on July 3. Billed as "The New Gershwin Musical Comedy", it is largely based on the songwriting team's 1930 musical Girl Crazy, but also incorporates songs from several other productions. It won the 1992 Tony Award (Broadway), the 1993 Olivier Award (London), and the 1994 Dora Award (Toronto) for Best Musical.

The modern theatre is built on the site of previous taverns and music hall theatres, where a place of entertainment has been located since Elizabethan times. Nell Gwynn was associated with the tavern, which became known as the Great Mogul by the end of the 17th century, and presented entertainments in an adjoining hall, including "glee clubs" and "sing-songs". The Mogul Saloon was built on the site in 1847, which was sometimes known as the "Turkish Saloon" or the "Mogul Music Hall." In 1851, it became the Middlesex Music Hall, known as The Old Mo. This in turn was rebuilt as the New Middlesex Theatre of Varieties, in 1911 by Frank Matcham for Oswald Stoll.

In 1919, the theatre was sold to George Grossmith, Jr. and Edward Laurillard, refurbished and reopened as the Winter Garden Theatre. They produced Kissing Time (1919, with a book by P. G. Wodehouse and Guy Bolton and music by Ivan Caryll), followed by A Night Out (1920), both starring Stanley Holloway. Grossmith and Laurillard also became managers of the Apollo Theatre in 1920. But expanding their operation caused Grossmith and Laurillard to end their partnership, with Grossmith retaining control of the Winter Garden.

Grossmith then partnered with George Edwardes's former associate, Pat Malone, to produce a series of mostly adaptations of imported shows at the Winter Garden between 1920 and 1926: Sally (1921), The Cabaret Girl (1922, with book by Wodehouse and music by Jerome Kern), The Beauty Prize (1923, with Wodehouse and Kern), a revival of Tonight's the Night (1923), Primrose (1924, with music by George Gershwin), Tell Me More (1925, with words by Thompson and music by George Gershwin) and Kid Boots (1926 with music by Harry Tierney), many of them featuring Leslie Henson. Grossmith co-wrote some of the Winter Garden pieces, directed many of his own productions and starred in several, notably as Otis in Sally. Several of the later productions lost money, and Grossmith and Malone ended the partnership.

The Vagabond King was produced at the theatre in 1927, and in 1929, Fred and Adele Astaire starred in Funny Face. In 1930, Sophie Tucker played in the Vivian Ellis musical Follow a Star, and in 1923, Gracie Fields appeared here in Walk This Way. In 1933, the theatre hosted Lewis Casson in George Bernard Shaw's On the Rocks, followed in 1935 by Love on the Dole, starring Wendy Hiller. The theatre closed in the late 1930s, reopening in 1942. In 1945, it hosted a Donald Wolfit season, and in 1953, Agatha Christie's Witness for the Prosecution played. 1956 saw The Water Gypsies by Vivian Ellis and A P Herbert; Hotel Paradiso starring Alec Guinness, Douglas Byng, Irene Worth and Billie Whitelaw; and Tyrone Power starred in Shaw's The Devil Disciple. 1958 included The Iceman Cometh.

The theatre closed permanently in 1959 when it was sold by the Rank Organisation to a developer. It was then gutted and remained vacant until 1965 to be replaced in 1973 by the current building.