English singer-songwriter Ed Sheeran will guest star in Season 7 of TV series Game Of Thrones.

While there are no details about his role yet, the showrunners of the blockbuster show, David Benioff and D.B. Weiss, said that he was featured as a "surprise" for cast member Maisie Williams, who is a huge fan of the musician.

In a Variety report, Benioff was quoted as saying: "For years, we tried to get Ed Sheeran on the show to surprise Maisie, and this year we finally did it."

He announced this on Sunday (March 12) at SXSW, or South By Southwest festival in Austin, Texas, the annual event that celebrates film, music and interactive industries.

Past seasons of the show have featured musicians before, such as Icelandic rock band Sigur Ros, Coldplay's Will Champion, and heavy metal band Mastadon.

Also at the panel, the showrunners confirmed that the eighth and final season of the hit show will be the shortest yet, with only six episodes. The first six seasons have 10 episodes each, while the upcoming Season 7 will have seven episodes.

Game Of Thrones Season 7 premieres in Singapore on HBO (StarHub TV Channel 601) on July 17.