Will Ed Sheeran have a role in the next season of Game Of Thrones?

The Rolling Stone cover star Ed Sheeran will play a small, unspecified role in the upcoming seventh series of the HBO fantasy drama. The executive producers David Benioff and Dan Weiss revealed Sheeran’s involvement on Sunday at a South by Southwest panel in Austin. They did not share any details about his role or when he will appear. Anyway, the fans will find out soon enough because the mega-popular fantasy series returns to TV screens on July 16.

Sheeran, 26, seemed to confirm the news.  “Guess the cat’s out the bag…,” he tweeted Sunday, linking to a news story exposing his secret Game of Thrones cameo.

guess the cats out the bag… https://t.co/9GCDUp9HPN

— Ed Sheeran (@edsheeran) March 12, 2017

The singer was invited to the set as a surprise for Sheeran superfan Maisie Williams. She plays Arya Stark on the show. Benioff and Weiss said they had been pursuing Sheeran for some time.

“For years, we tried to get Ed Sheeran on the show to surprise Maisie, and this year we finally did it,” Benioff told the audience at SXSW before saying that Further details on Sheeran’s role won’t be given.

In addition to Sheeran, Weiss and Benioff also confirmed a few details on the eighth and final season of the show. The final season in 2018 would consist of only six episodes, as HBO programming president Casey Bloys hinted.

“From the beginning, we’ve wanted to tell a 70-hour movie,” said Benioff. “It will turn out to be a 73-hour movie, but it’s stayed relatively the same of having the beginning, middle and now we’re coming to the end. It would have been really tough if we lost any core cast members along the way, I’m very happy we’ve kept everyone and we get to finish it the way we want to.”

Game of Thrones has a history of recruiting rockers to make unrecognizable appearances on the show, such as Coldplay’s Will Champion, Snow Patrol’s Gary Lightbody and members of Sigur Ros, Of Monsters and Men and Mastodon. In the latter case, the members of Mastodon were unidentifiable as the zombie-like Wildings, Vanity Fair reports.