Little is known about the plot of Christopher Nolan’s new sci-fi thriller Interstellar, which is based on theoretical physicist Kip Thorne’s ideas on the subject of wormholes, other than the fact that it will follow the adventures of a pioneering group of explorers who become the first humans to travel vast distances through space.

One thing we do know a lot about, however, is the cast list, which has been growing expansively and impressively. Jessica Chastain, Anna Hathaway and Matthew McConaughey are all signed on for significant roles, and will be joined by Casey Affleck (who is currently making waves with his performance in Ain’t Them Bodies Saints), Requiem for a Dream star Ellen Burstyn, John Lithgow, Wes Bentley, David Gyasi and quite a few more.

Just as he did with Inception, Nolan has been steadily gathering an ensemble cast of fairly big Hollywood names for Interstellar, and as filming begins another actor has been added to the list. The Playlist reports that Matt Damon has joined Interstellar in “a small, undisclosed role,” and will be on set in Iceland for two weeks out of the four month shooting schedule.

A smaller role might be all that Damon has time for, as Deadline reports that he has also entered negotiations to make his directorial debut with Paramount Pictures’ true-life thriller The Foreigner. The script was penned by Chris Terrio, writer of last year’s true story drama Argo, for which Damon’s long-time friend and acting partner Ben Affleck won a Best Picture Academy Award. Needless to say, a lot of interested eyes will be watching to see what Damon does with Terrio’s material, since the actor also won an Academy Award for screenwriting (jointly with Affleck) after Good Will Hunting, but is so far untested as a director.

Though Damon recently dismissed the idea of playing Robin to Affleck’s Batman, his involvement in a Nolan project may well raise questions about whether he might be joining the DC universe in the future. Nolan was only tangentially involved with Man of Steel and there’s no guarantee that he’ll return to do another comic book movie, but the director has used certain actors (Joseph Gordon-Levitt, Michael Caine, Christian Bale etc.) on more than one movie, so this could potentially be the start of an ongoing working relationship between him and Damon.

While we’re speculating, however, there’s currently a (very shaky) rumor floating around that Nolan and his wife Emma Thomas are no longer working on Snyder’s film as executive producers, after Affleck’s casting announcement went out with their names “conspicuously absent” from the list of people involved. If this means anything at all, it’s likely only that Nolan and Thomas have reduced involvement in Batman vs. Superman due to focusing on Interstellar, so take the headlines about Nolan storming out of Warner Bros over Affleck’s casting with a big pinch of salt.

Tell us in the comments what you think Matt Damon’s role in Interstellar could be. Will he play a human character that’s left behind on Earth, or will he don some forehead ridges and play an alien?

Interstellar opens in regular and select IMAX theaters on November 7th, 2014.

Source: The Playlist, Deadline