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Happily Divorced has played host to an impressive array of iconic TV stars during its first two seasons -- from Fran Drescher's Nanny comrades Charles Shaughnessy & Renee Taylor to Morgan Fairchild. And tonight's all-new episode adds another name to that ever-growing list when Rosie O'Donnell stops by the show.

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In the episode, titled Mother's Day, O'Donnell plays pet psychic Katie -- an old friend of Fran's -- who helps her make amends after forgetting to make Mother's Day plans with Dori (played by Rita Moreno). Although, as you can see from this ETOnline exclusive sneak peek clip, Dori and Fran have very different ideas of what constitutes fun!

Happily Divorced airs Wednesdays at 10:30 p.m. on TV Land.