In between filming their hit TV shows, Andy Samberg and Kit Harington will find some time to play tennis. The two have signed on to star in an HBO movie called 7 Days In Hell, which will be filmed as a sports mockumentary.

Samberg, who currently stars on Brooklyn Nine-Nine, and Karington, better known as Jon Snow on Game of Thrones, will play tennis stars battling it out on the Wimbledon court for seven days. According to Deadline, Murray Miller (Girls) is writing and Jake Szymanski (Saturday Night Live) will direct.

7 Days’ supporting cast will be brimming with stars. TheWrap reports that Lena Dunham (Girls), Karen Gillan (Selfie), Fred Armisen and Will Forte will be in it. Howie Mandel, Michael Sheen, Mary Steenburgen and June Squibb will also be there. Journalist Soledad O’Brien will appear as herself.

Samberg, Miller, David Bernad and Jonathan Buss are executive producing.

Samberg recently won a Golden Globe for Brooklyn Nine-Nine, which returns in September for its second season. Harington just finished the fourth season of Game of Thrones, which airs on HBO.

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