Genevieve O'Reilly isn't the only actor to join the likes of Diego Luna, Stellan Skarsgard, and Kyle Soller on the series. Denise Gough of BBC's Paula is on board, but no details are currently available about her role. Since the Rogue One prequel clearly doesn't have the same qualms as The Mandalorian when it comes to bringing existing characters into the series, it's possible that she could play an earlier, later, or live-action version of a character already existing in the Star Wars saga, although we'll have to wait and see.