About one in every 42 babies born worldwide is a twin, meaning Hollywood has its fair share of siblings with the same birthday.
Not every set of twins has the same desire for the spotlight. Sometimes, only one twin achieves celebrity status.
Rami Malek's twin, Sami, is a teacher, while Parker Posey's twin, Chris, is a lawyer.
Twins have a lot in common—but being famous is where some differ.
Yes, there are a host of celebrity twins who share the spotlight, from the Olsens to the Sprouses. Having a look-alike sibling may even have helped them stand out early in their careers. Yet for every duo like Sister, Sister stars Tia and Tamera Mowry, there's another pair of twins where only one of them is well known.

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