Caitlyn Jenner is the most fascinating person of 2015, according to Barbara Walters.

"If you found yourself unable to take your eyes of Caitlyn Jenner this year, you weren't alone," said Walters, noting how Jenner's transition prompted a national discussion about the definition of gender and raised awareness of transgender rights. "Through her own transformation, Caitlyn Jenner transformed society this year and that, for us, makes her the most fascinating person of 2015."

Walters annual countdown of the Most Fascinating People, which aired Thursday night, also included Bradley Cooper, Amy Schumer, Misty Copeland, Bernie Sanders, Donna Karan, Ronda Rousey, Jeff Bezos, Donald Trump and Tracy Morgan.