Despite working together on The Biggest Loser, Jillian Michaels and Bob Harper's offscreen friendship was quite different — but where do they stand now? NBC's The Biggest Loser, which premiered in 2004,

"Biggest Loser" trainer Bob Harper opened up about his 2017 heart attack, including the reaction of his costar Jillian Michaels.

Bob Harper, who cohosted 12 seasons of The Biggest Loser with Michaels, said in a recent interview with The Guardian that she was not among the alums of the controversial reality competition series who reached out to him after he suffered a heart attack.