Justin Ray Gaethje (/ˈɡeɪdʒi/; born November 14, 1988) is an American professional mixed martial artist. He currently competes in the Lightweight division in the Ultimate Fighting Championship (UFC). A professional competitor since 2011, he is a former UFC Interim Lightweight Champion, and former UFC BMF Champion. He is the second fighter in the history of the UFC to be awarded the BMF championship after winning the title at UFC 291. As of April 16, 2024, he is #3 in the UFC lightweight rankings.