R&B star Rihanna is setting her sights on a foray into acting in a bid to expand her international appeal.

The 20-year-old singer's hits are a staple on some of Hollywood's biggest soundtracks, but she admits she would like to grace the screen herself.

She insists she is unfazed by the stigma of becoming a singer-turned-actress.

She says: "I don't know how good I'll be at it, but it's something that I want to try."

The 'Umbrella' singer is reportedly set to star in upcoming film 'Mama Black Widow' - the story of a black family's migration from the South in the US in the 1930s. The film, currently in pre-production, is said to co-star Kerry Washington, Mos Def and Macy Gray.