Twice Upon a Time (1953 film)
 Twice Upon a Time is a British 1953 comedy film directed by Emeric Pressburger based on the book Lottie and Lisa by Erich Kästner. It concerns a pair of twin sisters who are separated when their parents divorce. They meet again by accident when they are both sent to the same summer camp and they hatch a plan to meet up again. Later films based on the same plot were titled The Parent Trap.