I Dreamed a Dream is the debut studio album by Scottish singer Susan Boyle. It was released on 23 November 2009 by Syco Music in the United Kingdom, and by Columbia Records in the United States one day later. In the standard edition, 11 out of the 12 songs that appear on the album are cover songs, plus the original composition "Who I Was Born to Be". It quickly became the world's biggest selling album of 2009, according to IFPI. The album had sold around 10 million copies worldwide since its debut.

The album entered the UK album chart at number 1 and became the fastest-selling debut album ever in the UK, selling 411,820 copies, beating the record previously set by Spirit by Leona Lewis and outselling the rest of the top five albums combined during its first week on sale. The album remained at the top spot for four weeks, becoming the biggest selling album in the UK in 2009. In the U.S., I Dreamed a Dream debuted at No. 1 on the Billboard 200, with 701,000 copies sold in its first week, breaking the record for the highest debut by a new solo female artist in the SoundScan era (post 1991). I Dreamed a Dream became the biggest opening sales week of 2009 in the U.S., beating out Eminem's Relapse which sold 608,000. It was the second-biggest selling album of 2009 in the U.S., with 3.1 million copies sold, right behind Taylor Swift's Fearless at 3.2 million copies. In only six weeks of sales, it became the biggest selling album in the world for 2009.