The Parent Trap. Poster of the 1961 movie and cover of the 1949 book, Lottie and Lisa
VS3
Lottie and Lisa
Erich Kästner, 1949
movie vs book
David Swift, 1961

Identical twins Sharon McKendrick and Susan Evers meet at Miss Inch’s Summer Camp for Girls, unaware that they are sisters. Their identical appearance initially creates rivalry, and they pull pranks on each other. After discovering that they both come from single-parent homes, they soon realize they are twin sisters and that their parents, divorced shortly after their birth, with each parent having custody of one of them.