Jillian Michaels Bio, Family, Net Worth, Fitness App and Facts Jillian Michaels is a popular American personal trainer and television personality. She has appeared in NBC show The Biggest Loser. Then she also came on the show The Doctors. In 2015 she hosted the series titled Sweat INC. on Spike. Read More -: https://www.gudstory.com/jillian-michaels-biography/