Well, that was quick!!!
TMZ Sports has learned Jon Jones is signed on to fight Anthony Smith at UFC 235 in March ... as long as the Nevada State Athletic Commission gives him the green light.
As we previously reported, several UFC fighters have been angling to get a crack at Jones after he returned from his suspension to beat up Alexander Gustafsson at UFC 232 last month ... including Luke Rockhold, Corey Anderson and Smith.
But now, we've confirmed ... Jon's next opponent will be 30-year-old Smith, who's currently on a 3 fight win streak after beating Volkan Oezdemir, Shogun Rua and Rashad Evans.