The Biggest Loser 'The Biggest Loser' is losing host Alison Sweeney after 13 seasons 08/26/2015 The Biggest Loser is saying goodbye to its beloved longtime host. Read More RELATED NEWS 'The Biggest Loser: Temptation Nation' premiere to feature "health or wealth" temptations and return of trainer Jessie Pavelka'The Biggest Loser' Season 17 cast, premiere and format revealed by NBC'The Biggest Loser's longtime trainer Bob Harper will host Season 17 TAGS: The Biggest Loser Alison Sweeney
