Bruce Willis made a surprising guest appearance on Friends as Rachel's love interest, Paul Stevens. He didn't accept any payment for his role in the show, which lasted for three episodes, because he lost a bet to Matthew Perry. If The Whole Nine Yards, a film they starred in together, opened at number one at the box office, then Willis would have to appear on Friends for free. Willis kept his promise and donated his entire salary from the show to charity. His little role is still beloved by fans and even earned him an Emmy award for Best Guest Actor in a Comedy category.
