Caroline Gilchrist Rhea born April 13 1964 is a Canadian actress TV personality host and standup comedienne She is also known for her role as Hilda Spellman on Sabrina the Teenage Witch and for replacing Rosie ODonnell as the hostess of her syndicated talk show renamed The Caroline Rhea Show She was the original host of the reality television show The Biggest Loser on NBC until Alison Sweeney took her place after the end of the third season She provides the voice for Linda Flynn mother of Phineas and Candace Flynn on the Disney Channel series Phineas and Ferb She would return to Disney Channel on the series Sydney to the Max playing the role of Grandma Judy She has performed numerous comedy specials including three onehour standup specials for HBO Showtime and Bravo
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