Jillian Michaels

Jillian Michaels is returning to The Biggest Loser next year — and she's got her eye trained on childhood obesity.

Michaels, who left the reality weight-loss competition show in 2011 after 11 seasons, will return for Season 14, which will premiere in January, NBC announced Tuesday. And, in a new twist, the show will feature child contestants (ages 13 to 17) for the first time, in addition to adults.

Why Jillian's leaving The Biggest Loser

Michaels and fellow trainers Bob Harper and Dolvett Quince will each coach a team of competitors, and each team will feature at least one child participant. The children will not be eligible for elimination, but will compete with their teams and strive to lose weight both at the Biggest Loser ranch and at their homes. The season will also feature celebrity guest stars.

With childhood obesity at an all-time high, Michaels (a new mother of two) said in a statement that she is "more passionate than ever about helping empower children and families with the information and resources they need to live a healthier life."

Are you glad Michaels is back?