The Parent Trap is a 1961 American romantic comedy film written and directed by David Swift. It stars Hayley Mills (in a dual role) as a pair of teenage twins plotting to reunite their divorced parents by switching places with each other. Maureen O'Hara and Brian Keith play the parents. Although the plot is very close to that of the 1945 film Twice Blessed, The Parent Trap is based on the 1949 German children's novel Das doppelte Lottchen by Erich Kästner.

Produced by Walt Disney Productions, The Parent Trap was released on June 21, 1961, by Buena Vista Distribution. It grossed $25.1 million at the box office and was nominated for two Academy Awards. It was broadcast on television, and three television sequels followed the later adventures of the twins. The film was remade in 1998 with Lindsay Lohan. It was released on VHS, in digital stereo LaserDisc format (1986), and on DVD (2002). The Parent Trap was the second of six films Mills made for Disney.