During Frasier's epic 11-season run, some equally epic celebrities served as guest stars. Read on to see if you remember 20 of the best.

As Kelsey Grammer told his co-star during a Q&A ahead of the "Frasier" season 2 premiere ... on the original series, actually guest starred on "Cheers" as Artie, a zookeeper and part-time ...

After Moose's death nearly two decades ago, the recent Frasier revival paid sweet tribute to the pooch. Frasier is available to stream now on Paramount+.