Top fitness expert Dolvett Quince becomes newest trainer on season 12 of NBC'S 'The Biggest Loser'

Quince will train contestants along with Bob Harper and Anna Kournikova

Dolvett Quince, an accomplished trainer who has been helping people get fit and healthy for 10 years, will bring his fitness expertise to "The Biggest Loser" as the show's newest trainer. Quince, whose clients have included teen superstar Justin Bieber, will train contestants along with "Biggest Loser" veteran Bob Harper and renowned tennis star and certified trainer Anna Kournikova. Season 12 begins shooting this week in southern California and will begin airing in September on NBC.

"I couldn't be more excited about joining 'The Biggest Loser' as their newest trainer," said Quince. "This amazing opportunity allows me to use my expertise to change lives one rep at a time, and encourage contestants - and viewers - to find strength beyond muscle."

Quince founded a workout studio in Atlanta called Body Sculptor Inc., where he has been the city's "go to" master trainer for 10 years. He grew up with three siblings in the foster care system in Stamford, Conn., where they were all adopted by a Jamaican couple who knew the four children needed to stay together. He says it was his difficult childhood that gave him his drive and strength to believe in himself and want to make a difference in the lives of others.

Quince's passion for health and fitness has attracted the attention of entertainers as well. Janet Jackson has worked out at his Atlanta studio, and Quince recently went on tour for three months with pop superstar Bieber, creating a workout and nutrition regimen designed to keep the in-demand entertainer in top shape.