20) Taylor Momsen - Gossip Girl (2007-2012)

Taylor Momsen was not exactly fired when she left Gossip Girl, but rather left at the end of season two, with her choice to move on because of her desire to concentrate on her increasing music career. Momsen, who played Jenny Humphrey, had been continuously clashing with producers throughout the second season as her desire to focus on the band The Pretty Reckless intensified.
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Edited by Abhimanyu Sharma