Thirteenth Step is the second studio album by American rock band A Perfect Circle, released on September 16, 2003. The album sold well, charting at the number 2 position on the Billboard 200 in its premiere week, selling over 231,000 copies and staying on the charts for 78 weeks. The album went on to be certified as gold on November 4, 2003 and as platinum on March 24, 2006 by the RIAA.