Take My Tip is a 1937 British musical comedy film directed by Herbert Mason (who stage managed some musical revues in the past), produced by Michael Balcon and starring Jack Hulbert, Cicely Courtneidge, Harold Huth and Frank Cellier.
 A pair of aristocrats adopt various disguises to unmask a confidence trickster.
Falling for You is a 1933 British comedy film directed by Robert Stevenson and Jack Hulbert, and starring Jack Hulbert and Cicely Courtneidge.
Dame Esmerelda Cicely Courtneidge DBE (1 April 1893 – 26 April 1980) was an Australian-born British actress, comedian and singer.
 The daughter of the producer and playwright Robert Courtneidge, she was appearing in his productions in the West End, by the age of 16, and was quickly promoted from minor to major roles in his Edwardian musical comedies.
"'The Flies Crawled Up the Window" is a British song originally sung by the actor Jack Hulbert in the 1932 comedy film "Jack's the Boy".
 The lyrics describe the antics of various flies as they crawl up windows.
 In the film it is sung by Hulbert's character, Jack Brown, to his disproving father (Peter Gawthorne) after he has returned drunk from an evening out.
Jack of All Trades is a 1936 British comedy film directed by Robert Stevenson and Jack Hulbert and starring Hulbert, Gina Malo and Robertson Hare.
 It is based on the 1934 play "Youth at the Helm".
 The film was made at Islington Studios, with sets designed by Alex Vetchinsky.
Under Your Hat is a 1940 British musical comedy spy film directed by Maurice Elvey and starring Jack Hulbert, Cicely Courtneidge and Austin Trevor.
Happy Ever After is a 1932 British-German musical film directed by Paul Martin and Robert Stevenson, and starring Lilian Harvey, Jack Hulbert, Cicely Courtneidge, Sonnie Hale, and Edward Chapman.
The Ghost Train is a 1931 British comedy thriller film directed by Walter Forde and starring Jack Hulbert, Cicely Courtneidge and Ann Todd.
 It is based on the play "The Ghost Train" by Arnold Ridley.
 The film's art direction was by Walter Murton.
Jack's the Boy is a 1932 British comedy film directed by Walter Forde and starring Jack Hulbert, Cicely Courtneidge, Francis Lister and Peter Gawthorne.
 Its plot follows a policeman who attempts to track down a gang responsible for a smash and grab raid, thereby proving his worth to his disapproving father.
 It became well known for its song "The Flies Crawled Up the Window", sung by Hulbert, which was released as a record and proved a major hit.
Soldiers of the King is a 1933 British historical comedy film directed by Maurice Elvey and starring Cicely Courtneidge, Edward Everett Horton and Anthony Bushell.
 It was Courtneidge's fourth film, and the first she appeared in without her husband Jack Hulbert.
 Courtneidge plays the matriarch of a music hall family, in a plot that switches between the Victorian era and the 1930s present.

Question: The daughter of playwright Robert Courtneidge starred with Jack Hulbert in what 1940 musical comedy film?
Answer: Under Your Hat