Cast and Crew in The Biggest Loser -

Kim Lyons
TrainerKim Lyons was 34 in The Biggest Loser - Season 4 - "Biggest Loser" Revealed in Season Finale! (Episode 15).

Birthday: Sat, May 05 1973

Bob Harper
TrainerBob Harper was 42 in The Biggest Loser - Season 4 - "Biggest Loser" Revealed in Season Finale! (Episode 15).

Birthday: Wed, Aug 18 1965

Alison Sweeney
HostAlison Sweeney was 31 in The Biggest Loser - Season 4 - "Biggest Loser" Revealed in Season Finale! (Episode 15).

Birthday: Sun, Sep 19 1976

Jillian Michaels
TrainerJillian Michaels was 33 in The Biggest Loser - Season 4 - "Biggest Loser" Revealed in Season Finale! (Episode 15).

Birthday: Mon, Feb 18 1974