Sarah Ferguson
Don't recognize this name? Maybe you know her better as the Duchess of York. She was excited to make a cameo with Matt LeBlanc in the episode where Ross marries Emily...infamously. The entire cast traveled to London to watch the couple crash and burn!
Hugh Laurie
Hugh Laurie was thrilled to be on the show for a cameo, though Hugh Laurie didn't act like it! When Rachel is seated next to the actor on the plane, he's not too happy to have an adoring fan fly overseas with him. This is comedy gold!