To declare that Ronda Rousey is a busy person is an understatement. The most recognizable female athlete is the longest-tenured UFC women’s bantamweight champion, a part-time pro wrestler, a clothing and accessories model, book author, and lately, a budding movie star.

Despite her full calendar, the 28-year old former Olympian never takes time off from taking care of her body. Case in point: During the recent red carpet premiere of “Entourage: The Movie,” Rousey tackled her playful competition with Wrestlemania 31 tag team partner Dwayne “The Rock” Johnson. The transcendent sports personalities are in a ferocious gym battle wherein they try to one-up each other by posting pictures of their latest workouts and gym routines, a contest that Rousey claims is her turf.

“He always calls himself the hardest worker in the room,” Rousey said via USA Today Sports. “Excuse me, I work harder than you, so now it’s a competition of who actually works harder.”

Johnson and Rousey have formed a camaraderie dating back to their appearance at this year’s Wrestlemania. The duo joined forces in the wrestling ring to trash-talk the power couple of Triple H and Stephanie McMahon in front of a record-setting crowd. It is still unclear if the tandem will last beyond the single appearance after UFC President Dana White declared that his best asset was limited to that single sighting in the WWE.

Nevertheless, this did not deter the judoka from continuing her friendship with Johnson, who still does a couple of cameos for Vince McMahon’s WWE. Rousey also shared that her gym battle with “The Rock” usually involves a little sarcasm.

Rousey just wrapped up filming "Entourage," which is set to hit theaters this weekend. She plays herself in the movie as the love interest of Turtle, one of the characters. The undefeated UFC star will defend her title next against Brazilian judoka Bethe Corriea on Aug. 1 in Rio de Janeiro.