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Big changes are coming to The Biggest Loser, and we've got the exclusive first look at the season 17 trailer that proves it. 

"This season is going to be completely different," says trainer and new host Bob Harper in the exclusive clip above.

There's a new gym, a new house, and even a new-ish team of trainers ready to change some lives and some bodies. 

After the departure of host Alison Sweeney, the show clearly underwent a sort of overhaul. Bob Harper took over as host, and now the training team consists of Dolvett Quince and Jen Wilderstrom, whose teams will go head to head throughout season 17. 

Two of the contestants this season happen to be familiar faces, including Survivor's first season winner, Richard Hatch, and his partner, season two Voice contestant Erin Willett

Watch the trailer above to see what's ahead this season! 

The Biggest Loser, cast 2015

NBC

Hatch is perhaps Survivor's most infamous winner as well as being its first, given his appearance on Celebrity Apprentice and his stint in jail for tax evasion, but it seems that he's ready to make some positive changes by competing this season. 

His partner, Erin, who Hatch did not meet until the competition started, made it to the semi-finals on season two of The Voice, where she competed on Team Blake and was just shy of making it to the top four. 

They are joined by fellow contestants from all over the country, from newlyweds to mothers and daughters, and even a pair of twins! 

Season 17 certainly is shaping up to be an interesting one, to say the least. 

The Biggest Loser season 17 kicks off with a two-hour premiere, Monday, Jan. 4 at 8 p.m. on NBC