So the wife wanted to watch all ten seasons of Friends. Imagine the surprise when I ran the guest appearances list through Grok:

Here’s an alphabetical list of notable guest stars who appeared on Friends—just the actors, no episode details unless you want ’em. • Alec Baldwin • Ben Stiller • Brad Pitt • Bruce Willis • Charlie Sheen • Christina Applegate • Danny DeVito • Elle Macpherson • George Clooney • Hugh Laurie • James Caan • Julia Roberts • Kathleen Turner • Lisa Kudrow (as Phoebe’s twin, Ursula—counts, right?) • Maggie Wheeler (as Janice, recurring but started as guest) • Michael Rapaport • Reese Witherspoon • Robin Williams • Sean Penn • Susan Sarandon • Tom Selleck

Surprised not to see Richard Branson on this list. Since he was featured as Tourist Cart owner selling Joey a big ole British Flag Hat in Season 5.