Dwayne Johnson was the highest-paid actor in Hollywood in 2016, and the A-list megastar shows no signs of slowing down. He stars in The Fate of the Furious, Baywatch, and Jumanji in 2017 alone, and has a big role as Black Adam in Shazam! coming down the road. Johnson may not be just the most bankable star in Hollywood right now, he’s also the hardest working.

Despite his massive success as a movie star, Johnson is still not forgetting his roots as one of the most popular, charismatic stars in the history of World Wrestling Entertainment. He is going back to those roots with an upcoming project based on WWE star Paige called Fighting With My Family. The cast just got a lot stronger, adding two veteran stars to join Johnson.

As reported by Variety, Johnson tweeted on Wednesday that Lena Headey (Game of Thrones) and Nick Frost (Shaun of the Dead) will play as-yet unconfirmed roles in the upcoming comedy-drama. Johnson’s official role is also unknown at this point. They join star Florence Pugh as Paige and Jack Lowden as her brother. Stephen Merchant (The Office) will direct based on his own script.

The movie tells the story that was first depicted in the Channel 4 documentary The Wrestlers: Fighting With My Family. It is based on the life of Paige, who is part of a famous professional wrestling family in the U.K. Produced by Johnson’s own Seven Bucks Productions, WWE Studios, Misher Films, and Film4, principal photography for Fighting With My Family begins in Los Angeles later this month.

As for the casting, Fighting With My Family certainly has the right idea in hiring entirely actors from the U.K. to portray a prominent British wrestling family. Headey’s recent work with Game of Thrones speaks for itself, as she has clearly demonstrated she can deftly handle any kind of heavy drama. Frost, meanwhile, is best known for his comedic roles. But the two appear likely to play Paige’s parents, known by their ring names Ricky Knight and Saraya Knight.

The idea of Headey and Frost donning over-the-top wrestling spandex to portray a pair of British pro wrestling legends is beyond intriguing. Merchant, however, is a relative unknown as a first-time feature-length movie director and the success of the movie could depend on his writing. But the dialogue is certainly going to be in good hands with Johnson, Headey, and Frost handling much of the work. It’s a big indicator that Johnson is betting big on Seven Bucks Productions, which is also producing Baywatch and Jumanji, to take their work to the next level.