The Parent Trap (1998)

When two pre-teens named Hallie and Annie meet at summer camp, their lives are rattled when they realize that they are identical twins. With parents, British mother aka famous dress designer Elizabeth and American father, a wine maker named Nick, living on different sides of the universe, the girls decide to make an identity swap in hopes of spending time with their other parent. The girls later choose to inform their guardians of the swap while at a hotel in San Francisco, which later reunites the divorced pair and they remarry.