"When You Believe" is an Academy Award-winning song composed by Stephen Schwartz for the DreamWork's animated feature The Prince of Egypt, and produced as a single with additional music by writer-producer Babyface. It was the main theme of the film and was released as a single by American divas Whitney Houston and Mariah Carey as the soundtrack's first single in 1998 (see 1998 in music); it was also the first single from Houston's album My Love Is Your Love and the second from Carey's compilation album #1's. A 're-worked' version of "When You Believe" was the debut single by the winner of the fourth series of The X Factor, Leon Jackson, and the British Christmas Number One of 2007.