The 22-year-old pop-R&B star has signed on to make her feature-film debut in the action flick, which, as it sounds, is inspired by the classic Hasbro board game, her rep confirms to E! News.
While the songstress' soundtrack credits on IMDb are many, she's yet to appear as anyone but herself on TV, let alone the big screen.
But at least Rihanna's got a seaworthy cast and crew behind her, including Friday Night Lights hunk Taylor Kitsch and True Blood hottie Alexander Skarsgård as brothers who end up leading the fight for their planet's survival against an otherworldly force.
Hancock helmer Peter Berg is attached to direct with an eye on a May 25, 2012, release date.