All the stars you had no idea were once on 'Baywatch'

With 1990s nostalgia at its peak, and with the new "Baywatch" movie starring possible future president Dwayne "The Rock" Johnson and Zac Efron, it's time to take another hard look at the hit show that made red swimsuits and running on the beach in slow motion pop-culture staples.

Many well-known actors and even A-list stars (Michelle Williams!) got small (or in some cases, big) roles on "Baywatch" before they became known for something else entirely. You seriously won't believe who some of them are.

Here are all the famous people you didn't know were once on "Baywatch":