Popular octagon player Arianny Celeste, better known as "UFC Mama", posted a sexy photo in a bikini on social media.
Celeste, 37, has been with the UFC since 2006. She has more than three million followers.
UFC 290 will take place on July 9 in Las Vegas (USA). UFC featherweight champion Alex Volkanovski and Yair Rodriguez will meet in the main event of the evening.
The co-main event of the tournament will feature a bout between UFC flyweight champion Brandon Moreno and Alexandre Pantoja. In addition, Robert Whittaker will face Dricus du Plessis at UFC 290.