The 24-year-old singer's clothing and accessories will grace the runway next month, with the star eager to see what the public thinks.
[Pictured above: Rihanna performs at the Victoria's Secret Fashion Show 2012]
She said in a statement: "Launching at London Fashion Week is a dream come true for me.
"I have wanted to design my own collection for a long time and to present my collection for River Island alongside all of the other great design talent at LFW is a real privilege. I can't wait to see the reaction from my fans and the fashion press!"
[Pictured above: Rihanna performs in London last year]
The Rihanna for River Island collection will launch globally in River Island stores and online on March 5.
The line has also been picked up by another retail outlet for distribution in the US.
Rihanna tweeted on Thursday: "And for the fly girls in the U.S. Im very happy to announce that my #RihannaForRiverIsland fashion line will be carried by OPENING CEREMONY."
Photo gallery - Rihanna's controversial outfits:
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