Rihanna's movie career is moving along. After making her big-screen debut in the sci-fi action thriller Battleship , she's now set to lend her voice to an animated film called Happy Smekday!, according to the Hollywood Reporter .  Jim Parsons of Big Bang Theory fame will be her co-star in the movie, which is based on the award-winning book The True Meaning of Smekday.

In the film, a friendly alien race uses Earth as a hideout from its enemy.  But when one of the aliens accidentally blows their cover, he has to go on the run with a teenage girl.  The two set off on a cross-country trip during which they both learn what it means to be human.  Parsons plays the alien, and Rihanna plays the girl.

Rihanna also recently filmed a cameo in the new comedy The End of the World, directed by Seth Rogen .

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