Canadian actress best known for her role as Hilda Spellman on 142 episodes of Sabrina the Teenage Witch. She also voices the character Linda Flynn-Fletcher on Phineas and Ferb. In 2017, she began appearing in the ABC series Match Game.
She did stand-up comedy in New York City.
Rosie O'Donnell chose Rhea to take over her talk show, although she changed the title to fit her own name.
She had a daughter named Ava in 2008 with Costaki Economopoulos.
She was replaced as the host of The Biggest Loser by Alison Sweeney.