Naman Ramachandran Woody Harrelson, Andy Serkis and Louisa Harland will star in a new production of David Ireland’s award-winning play “Ulster American” at London’s Riverside Studios. In the black comedy, an Oscar-winning American actor, an English director and a Northern Irish playwright are about to begin rehearsals for a new play, one that could transform each of their careers. But when it turns out that they’re not on the same page, the night threatens to spiral out of control.