Mars Retail Group will open the M&M's World store in the famous Swiss Centre building in London's Leicester Square. The 35,000-square-foot store is the first of its kind in Europe.

"When it opens in the summer of 2011, M&M's World will provide visitors with a fun and interactive experience offering M&M's chocolate candies and an array of fun colorful M&M's-branded merchandise," says Susan Saideman, president of Mars.