The 1998 Disney movie The Parent Trap concerned twins separated by their parents' divorce who find each other and scheme to reunite the family. The movie was a remake of the 1961 film starring Hayley Mills, in a time when divorce was rarer and lifelong separation of siblings was somewhat more plausible. The intriguing gimmick of both versions was the interaction of twins played by the same actor. Pulling it off made 11-year-old Lindsay Lohan a star. Twenty years later, let's learn some more about what went into The Parent Trap.
10. For the split scenes Lohan would wear an earpiece that would allow her to hear the dialogue of the other sister.
This would make an easier dialogue between Lohan and her other self and provide less of a gap in between the different parts of the conversation. Plus it would look more natural.
9. This was Lohan’s first movie.
This was pretty good for for a debut to be honest and it managed to get her noticed and signed to other parts eventually.
There's more trivia about The Parent Trap at TVOM.