No role was announced for the chart-topping singer, said Variety. Kitsch, of "Friday Night Lights," plays naval commander Alex Hopper, described by Universal Pictures as "wildly spirited" and "a great seaman but a lousy politician." Skarsgård, of "True Blood," plays his brother.
Set to film in Hawaii and in Baton Rouge, La., the seafaring sci-fi picture features an international armada versus extraterrestrial invaders. The first direct board-game adaptation since 1985's "Clue," it sails into theaters ahead of Ridley Scott's planned "Monopoly," Michael Bay's "Ouija" and Kevin Lima's ("Enchanted") "Candyland."
Rihanna, 22, adds the acting gig to a schedule that's already busy, bringing her "Last Girl on Earth Tour" to Madison Square Garden on Aug. 12 and to Nikon at Jones Beach on Aug. 15 - and planning Katy Perry's bachelorette party. "It's so much pressure," Rihanna told "Access Hollywood" about the latter. Perry's wedding to British comedian Russell Brand "is probably going to be the best wedding I've ever been to and now I have to match the bachelorette party to that."