Rosie O'Donnell is never one to hold back. In an Aug. 19 Instagram post, she called out fellow TV icon Jay Leno for a mean-spirited 2009 segment from "The Tonight Show with Jay Leno," which was revisited in the new Netflix docuseries " Fit for TV: The Reality of the Biggest Loser ."

The Reality of the Biggest Loser,” O’Donnell publicly called out Jay Leno for how he treated former contestant Tracey Yukich in the doc. “Jay Leno is a mean a—— #biggestloserdocumentary,” O’Donnell captioned her Instagram post Monday,

Rosie O’Donnell is taking aim at Jay Leno after one of his cruel late night stunts resurfaced in the new “The Biggest Loser” documentary. The Netflix series, “Fit for TV: The Reality of the Biggest Loser,” shows a clip of Leno reading aloud death threats aimed at former contestant Tracey Yukich while she sits alongside him.