Sure, Black Sabbath are metal legends, but after 35 years since Ozzy OsbourneTony Iommi and Geezer Butler recorded an album together, there was no telling how the band's new disc '13' would perform on the charts. But now the numbers are out and the album is a huge success, landing at No. 1 on the Billboard 200 chart with an impressive 155,000 copies sold in the United States during its first week out.

The album marks Black Sabbath's first-ever No. 1 on the Billboard chart and remarkably it's only the band's second Top 10 entry (1971's 'Master of Reality' hit No. 8). Earlier in the week, '13' also topped the UK chart, making it the band's first album to hit No. 1 on that tally since 1970's 'Paranoid.'

The first-week sales total in the U.S. for '13' more than triples the next entry on the chart. Daft Punk's 'Random Access Memory' remains at No. 2 this week with 48,000 copies sold. Meanwhile, Queens of the Stone Age's '... Like Clockwork,' which debuted at No. 1 last week, slips down to No. 15 this week with 24,000 units moved.

"The news is absolutely amazing -- we couldn't have imagined this would happen,” says guitarist Tony Iommi in a statement. "We have the greatest fans." Meanwhile, Ozzy Osbourne adds, "There have been so many amazing highlights in our long career,” says OZZY OSBOURNE. “To finally have our first No. 1 album in the U.S. is another incredible milestone for Black Sabbath. Thank you to all of our fans for their support and loyalty.” Finally, bassist Geezer Butler comments, "I'm absolutely stunned. Thank you all world wide for being the best, and most patient, fans ever."

Black Sabbath will embark on a full North American tour beginning July 25 in Houston and finishing up in Los Angeles on Sept. 3.