"Pack Up Your Troubles in Your Old Kit-Bag, and Smile, Smile, Smile" is the full name of a World War I marching song, published in 1915 in London. It was written by Welsh songwriters, George Henry Powell under the pseudonym of "George Asaf", and set to music by his brother Felix Powell. A play presented by the National Theatre recounts how these music hall stars rescued the song from their rejects pile and re-scored it to win a wartime competition for a marching song. It became very popular, boosting British morale despite the horrors of that war. It was one of a large number of music hall songs aimed at maintaining morale, recruiting for the forces, or defending Britain's war aims.
In the 1932 comedy movie High Pressure, William Powell ends his "dynamic personality classes" by leading the salesmen in singing this song to pump up the product and stock (even though there is yet no product)
The song was recalled in the title of the 1932 Laurel and Hardy film Pack Up Your Troubles, where the duo are drafted and make a friend who dies during the war, then in its aftermath try to reunite his orphaned baby daughter with her surviving family.
The song was also used in the 1938 film The Shopworn Angel. Margaret Sullavan, who plays Broadway singer Daisy Heath, performs the song in a special concert for World War I troops about to be shipped overseas. Daisy also sings the song in the film's finale, before she learns that her husband Bill Pettigrew (played by Jimmy Stewart) has been killed in action.
It is sung and danced to in the finale of the 1942 musical What's Cookin'? with slight lyric alterations.
The song features prominently in the second assignment of Sapphire & Steel, whistled by the ghost of a dead soldier.
The name of the 2003 Richard Thompson album The Old Kit Bag hints at the song title but the album makes no explicit reference. When asked if the album had a theme, he had no immediate answer, then said "I suppose the title is a theme of sorts. It's a reference to the old World War I song, 'Pack up your troubles in your old kit bag,' which is about smiling and whistling a happy tune as the Germans rain shells down on you."
It was covered by Minnutes on their 2009 album Pretty Baby. This version was used in the Season 1 finale (episode 10) of Castle ("A Death in the Family").
It was featured in the 1969 film Oh! What A Lovely War in the scene when the first wounded soldiers from Mons arrive at Charing Cross Station (and thus uses artistic licence, since this battle took place in August 1914). The tune is initially played quietly while the camera pans across the faces of the battle's survivors, gaining in volume until the soldiers join in with full voice as they march away from the station.