By Kate Ward
Updated June 28, 2009 at 08:13 PM EDT

Billy Mays, most well-known for his OxiClean commercials, died in his sleep last night, according to the Discovery Channel. The spokesman was 50 years old. Discovery Channel issued the following statement: “Everyone that knows him was aware of his larger-than-life personality, generosity and warmth. Billy was a pioneer in his field and helped many people fulfill their dreams. He will be greatly missed as a loyal and compassionate friend. Our deepest sympathies go out to his family at this time of incredible loss.” An all day marathon of Mays’ Discovery show, Pitchmen, airs on July 1 starting at 11 a.m ET/PT, with the season finale airing at 10 p.m. ET/PT.