Caroline Gilchrist Rhea is a Canadian stand-up comedian and actress who was the original host of the reality television show The Biggest Loser on NBC until she was replaced by Alison Sweeney after the end of the third season.Born: April 13, 1964,Height: 5' 8" (1.73 m),Children: Ava Rhea Economopoulos,Parents: David Rhea, Marjorie Rhea,TV shows: Sabrina, the Teenage Witch, Phineas and Ferb