'Game of Thrones' showrunners made a big announcement at their SXSW panel on Sunday.

David Benioff and DB Weiss, writers and executive producers of the show, announced during a panel that Ed Sheeran will appear in the seventh season of 'Game of Thrones' because actress Maisie Williams is a fan.

"For years, we tried to get Ed Sheeran on the show to surprise Maisie, and this year we finally did it," Benioff said.

Sheeran later confirmed the news, tweeting, "Guess the cat's out of the bag."

It is not yet clear what role Sheeran will play, but fans are already excited.

Several other musicians have made appearances on the show, including the bands Mastadon, Sigur Ros and Will Champion of Coldplay.

The seventh season is scheduled to premiere on July 16, 2017.