“Frasier” had a great cast, but a successful sitcom also will feature big guest stars. In the world of “Frasier,” a lot of celebrities would do “cameos” just by appearing as callers on ...

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.

Sources revealed the 'Cheers' alum is begging his former co-stars to sign-on in hopes of saving his show from cancellation.