'The Biggest Loser' 2016 Cast: Meet The Season 17 Contestants Before The Jan. 4 Premiere

Out with the old and in with the new! In January, audiences will welcome the return of NBC's hit reality series "Biggest Loser." And according to Bob Harper, the fitness show's newest host, the long-running TV series will have quite the revamp when it hits the small screen in 2016.

"We've got a new gym, we've got a new house, I'm the new host," Harper, who took over for Alison Sweeney following her departure from the show after 13 seasons, says in a promo video. But Harper revealed that what he's most excited for fans to see come Season 17 of "Biggest Loser" isn't the high-tech equipment or lavish living space, but rather the introduction of the show's newest contestants.

"We've got mothers and daughters, husbands and wives, siblings, best friends and we've got one team -- they've never met!" Harper says before teasing that the mystery duo aren't strangers to reality TV. According to Us Weekly, both Richard Hatch, who won the first season of "Survivor," and Season 2 "The Voice" contestant Erin Willett will compete in the new season of "Biggest Loser."

Willett, who placed fifth in the singing competition, revealed that after competing on "The Voice" her confidence plummeted.

"I was 22 years old and just seeing the world for the first time, really," she told People magazine. "And people are mean sometimes. Especially when they're hiding behind a computer. For every 10 amazing tweets and comments, there would be that one that I would just focus on."

According to the aspiring songstress, it was the comments about her weight the hurt her the most. "When they call me fat, I know I'm fat. I'd done things to put myself in that position and I didn't want to be there anymore," the 26-year-old said, revealing that she's "ready to make a change" -- and she's ready to make them alongside 15 other contests.

Meet the 16 contestants competing in Season 17 of "The Biggest Loser" below:

Britney Anderson, 27, 253 lbs. -- Britney strives to play with her nieces and nephews without getting tired and to walk confidently into a room.

Colby Wright, 31, 339 lbs. -- Colby, who is married to his teammate Hope, has the hopes of one day being able to shop at a regular clothing store again instead of a specialty one.

Erin Willet, 26, 238 lbs. --Erin, a singer-songwriter who appeared on "The Voice," is ready to take control of her destiny and lose weight in a healthy way – something she's struggled to do in the past.

Felicia Buffkin, 29, 234 lbs.-- The Nanny from North Carolina hopes to feel confident in her skin after shedding the weight.

Hope Wright, 35, 232 lbs. --The Georgia native's biggest motivation for joining "Biggest Loser" was to lead a healthy life and to have a baby.

"My turning point was my obstetrician/gynecologist telling me I will never have a baby at my weight and with my health conditions," Hope said.

Jacky Kmet, 42, 304 lbs. -- Jacky, who has borderline high blood pressure, hopes to lose weight to end restrictions in her life (and to zip-line in Costa Rica).

Lauren Clark, 32, 234 lbs. -- Lauren, who is a licensed nutritionist as well as certified Zumba and Crossfit trainer, is excited to conquer her emotional eating and get herself back to her healthy lifestyle.

Luis Hernandez, 36, 308 lbs. -- The Chicago resident was motivated to get in shape by his two, young sons. He's excited to get fit and start an afterschool 5k program with his students, as well as partake in his first marathon.

Richard Hatch, 54, 314 lbs. -- The "Survivor" winner is battling high blood pressure, high cholesterol and pre-diabetes due to his weight. He strives to live a less stressful life after losing the weight.

Rob Kidney, 56, 326 lbs. -- Rob partook in emotional eating following traumatic events in his life. But he's ready to "repair the damage" and live a healthier life – one that involves riding roller coasters, running a marathon and playing basketball.

Roberto Hernandez, 36, 348 lbs. -- The Illinois Physical Education teacher is looking forward to shedding the pounds to inspire his students and be a healthy role model.

Sarah Gilbert, 27, 267 lbs.-- Sarah is teaming up with her father Rob on "Biggest Loser" to get fit. She looks forward to doing things in life that her weight held her back from (and to take a second honeymoon with her husband!).

Stephen Kmet, 43, 309 lbs. --Stephen is ready to hit the puck once again! The former recreational ice hockey player is excited to get fit and get back onto the rink as well as partake in new adventures like learning how to surf.

Tonsheia "Toy" Grandison, 35, 316 lbs. -- A tragic event in Toy's life affected her health. But the Georgia native is ready to achieve the athletic body she once had.

Vicki Clark, 54, 237 lbs. -- Vicki looks forward to partaking in physical activities with her family. from bodybuilding to trail running.

Whitney Clay, 30, 253 lbs. -- The North Carolina-based nanny's biggest motivation for getting fit is to be a healthy role model for the children she cares for.

"The Biggest Loser" will return to the small screen on Monday, Jan. 4, at 8 p.m. EST with a two-hour Season 17 premiere.