Donald Anthony Cerrone (born March 29, 1983), known professionally by his nickname "Cowboy", is an American former professional mixed martial artist, former kickboxer, and actor best known for competing in the Lightweight and Welterweight divisions of the Ultimate Fighting Championship (UFC), and the Lightweight division of the World Extreme Cagefighting (WEC).

He is known and respected by fans for his willingness to fight any time, having completed thirty-eight fights in his eleven-year UFC tenure. Cerrone challenged for the WEC Lightweight Championship in 2009 and 2010, and the UFC Lightweight Championship in 2015. He was inducted into the UFC Hall of Fame in July 2023.