La Roux's second single "In for the Kill" was released on 16 March, 2009, and prominent dubstep producer Skream has created a remix of the track as well as one being made by Lifelike.  "In for the Kill" debuted at number 11 in the UK Singles Chart on 22 March 2009, peaking at number 2 to date. Bulletproof was released on the 22 June 2009 and debuted at # 1 in the UK Singles Chart. The song was released on 11 August, 2009 in the United States and topped the Dance/Club Play chart the week of September 17th. 'I'm Not Your Toy' is scheduled for 28 September release.

In order to promote La Roux, the band were the supporting act on Lily Allen's UK tour of March 2009. La Roux headlined the Samsung NME Radar Tour 2009 and played alongside Magistrates, Heartbreak and The Chapman Family.  They were scheduled to perform at the Glastonbury, Reading, Oxegen and Leeds festivals as well as the Scala, Southend Chinnerys and Coventry Kasbah venues.  

In July and August 2009 La Roux toured North America. The 8 city tour included performances at the Montreal Osheaga Festival, All Points West Festival, and the Lollapalooza event. On 23 July the group performed on the Jimmy Kimmel Live show. The group will return to North America for a 7 date tour in October.  

The group sold out their two Australian dates within minutes forcing an upgrade in venues.  November will see the duo embark on an 11 date United Kingdom and Ireland tour. La Roux gained fifth position on the BBC's Sound of 2009 poll.  The Guardian website featured La Roux on their new band of the day column.  The Guardian also featured La Roux as one of the "Best New Acts of 2009" in the January of that year. The album has been nominated for a Mercury Prize.