I Live in Grosvenor Square is a British comedy-drama romance war film directed and produced by Herbert Wilcox. It was the first of Wilcox's "London films" collaboration with his wife, actress Anna Neagle. Her co-stars were Dean Jagger and Rex Harrison. The plot is set in a context of US-British wartime co-operation, and displays icons of popular music with the purpose of harmonising relationships on both sides of the Atlantic. An edited version was distributed in the United States, with two additional scenes filmed in Hollywood, under the title A Yank in London. Plot In the summer of 1943, after he is taken off combat operations for medical reasons, American SSgt John Patterson (Dean Jagger), an Army Air Force gunner, is billeted in the London home of the Duke of Exmoor (Robert Morley) in London's Grosvenor Square. He is befriended by the Duke and British paratrooper Major David Bruce (Rex Harrison). The latter has taken leave from the army to contest a parliamentary by-election in Devonshire. On a weekend visit to the duke's estate near Exmoor in Devon, Patterson meets the duke's granddaughter, Lady Patricia Fairfax (Anna Neagle), who is also a corporal in the Women's Auxiliary Air Force. However, she is David's childhood sweetheart. After a cool beginning, distanced on cultural misunderstandings, they fall in love. David is unaware of what is happening until the final night before the election, when it becomes clear to him during a party on the estate. The next day, the duke learns that his estate has been appropriated by the American army for a base and that David has lost the election. David and Patricia argue, and David plans to return to active service. When Patterson realizes that Pat and David have long expected to marry, he contrives to obtain medical clearance to go back to combat duty. David realises that Pat still loves Patterson and arranges for them to reunite. Returning from a mission with heavy battle damage, Patterson attempts to help his pilot land their B-17 Flying Fortress at an emergency landing strip at Exmoor, but is killed when the bomber stalls as they manoeuvre to avoid crashing in the village. The plane explodes killing everyone. Ironically it is Pat who takes the message listing the dead. The duke and his family mourn Patterson at a memorial service in the village church, an American flag is presented to be hung in