It was “The Prodigy” all along!

Cris Cyborg brought a masked man with her to UFC 222 open workouts Thursday at MGM Grand, ahead of her main event women’s featherweight title defense against Yana Kunitskaya. Cyborg did some grappling with the masked man — who revealed himself to be the legendary BJ Penn.

Both Cyborg and Penn are students of boxing coach Jason Parillo in Orange County, Calif.