Peter Dinklage has joined James McAvoy and Michael Fassbender for the X-Men sequel, Days Of Future Past.
Director Bryan Singer revealed on Twitter that the Game Of Thrones actor is the latest addition to the next instalment of the superhero series.
"Officially like to welcome #PeterDinklage from #GameOfThrones to #XMEN #DaysofFuturePast Very very excited!" he tweeted.
Peter, who plays dwarf Tyrion Lannister in the HBO fantasy series, is tipped to take the role of Puck - a dwarf who is a skilled fighter and has superhuman strength.
James and Michael are already set to reprise their leading roles as Charles Xavier (Professor X) and Erik Lensherr (Magneto) in the upcoming follow-up to Matthew Vaughn's 2011 film.
Sir Ian McKellen, Sir Patrick Stewart, Hugh Jackman, Ellen Page, Anna Paquin and Shawn Ashmore are set to reprise their X-Men characters, alongside returning cast members Jennifer Lawrence and Nicholas Hoult.
Bryan has also revealed that shooting will begin in April and that he can't wait to bring the star-studded ensemble from both the last film and previous X-Men movies together.
"It's a big movie. It'll be the biggest movie I've ever made. I got the impression that everyone was kind of excited to come back," he said.
"The actors from X-Men: First Class are contracted to, but the ones I've spoken to are very enthusiastic. Jen's very excited, I'm with Nick these past few days and he's excited, and Hugh, Ian, Patrick, Anna - they remember we felt very good about those first two X-Men films back then.
"I think there's a good feeling about all of us working together again, and I'm very excited to work with the new cast members as a director as opposed to just a producer," he added.