For years, Bob Harper and Jillian Michaels appeared to have great chemistry onscreen while filming "The Biggest Loser" together. But a new docuseries about the NBC weight-loss competition has fans wondering if the dynamic duo actually got along in real life.

Alongside Harper was fellow straight-talking coach Jillian Michaels, and despite the pair competing as team leaders, each hoping their contestants would be the ones to lose the most weight at the weekly weighing in ceremony, they seemed to share a close and loving friendship.

Jillian Michaels is planning to sue Netflix and Bob Harper after Fit For TV: The Reality of The Biggest Loser – here’s what went down.