Kelly also acted in "One Night the Moon" alongside his then wife, Fairfax, and with their younger daughter Memphis. All three sing on the soundtrack, including together for the lullaby, "One Night the Moon" (see "pictured"). According to Romaine Moreton, Australian Screen Online curator, the "lullaby that the family sings, written by Paul Kelly, sets the tone of the film ... The song is used in this film as a vehicle to explore the characters' interior worlds, something very unusual for a film". Kelly and Fairfax separated before the film's release.