Sigh No More is the debut studio album by London-based rock quartet Mumford & Sons. It was released on 2 October 2009 in the UK, and on 16 February 2010 in the United States and Canada. The album entered the UK Albums Chart at No. 11 and peaked at No. 2 on 20 February 2011, in its 72nd week on the chart and following its Album of the Year win at the Brit Awards. In early 2011, the album peaked at No. 2 on the Billboard 200 in the US.
 
In mid-2010, it was rated the year-to-date's 8th best record on NPR's All Songs Considered. On 20 July 2010, it was shortlisted for the Mercury Prize, awarded annually for the best album in the United Kingdom and Ireland. On 6 December 2010, a deluxe edition was released. This included the original album, a live CD of the concert from the O2 Shepherds Bush Empire, and a DVD containing parts 1, 2 and 3 of the Gentlemen of the Road documentaries. On 15 February 2011, the album was awarded the Best British Album at the BRIT Awards. In the United States, it was the 3rd most digitally downloaded album of 2011, selling 761,000 copies.