EXCLUSIVE: Jillian Michaels Shops for Engagement Rings for Her Girlfriend in 'Just Jillian' - Plus Premiere Da

Jillian Michaels is looking to put a ring on it!

Jillian Michaels
is looking to put a ring on it!

For 10 years we watched the fitness phenomenon shape people's lives on NBC's The Biggest Loser, and now it's time to discover a softer side to the tough-as-nails trainer.

The new E! docu-series, Just Jillian, will premiere on Tuesday, Jan. 19 – and only ET has your exclusive sneak peek at all the crunches and conflicts headed our way.

MORE: 9 of the Most Motivational Moments From Jillian Michaels

The eight-episode first season will give fans an unprecedented look into Jillian's chaotic, cuss-filled personal life as she tries juggle life with an ever-growing empire, two kids, the longtime love of her life, a steadfast business partner, a family of dear friends, and 15 pets.

On top of all that, Jillian's longtime partner, Heidi Rhoades, is hoping to tie the knot and add a third child to their budding family, which already includes of five-year-old Lukensia and three-year-old Phoenix.

Press play on our exclusive Just Jillian trailer above to get your first look Jillian's engagement shopping adventure and see if she'll commit to saying "I do."

The series premiere of Just Jillian airs Tuesday, Jan. 19 at 10 p.m. ET/PT on E!