Arcade Fire have opened pre-sales for their fourth album Reflektor, announcing last night that the record will be a double LP and it will be followed by a world tour.

Pre-orders are now being accepted for the album on ArcadeFire.com, where it states that advance orders of the album will entitle you to first access to ticket sales for special shows and the band's upcoming world tour.

Arcade Fire played an unannounced show last night as 'The Reflektors' in Montreal, with only 100 tickets going on sale and an official tweet from the band proclaiming that "Formal attire or costume MANDATORY".

The Reflektor album cover

The official video for 'Reflektor' has been released also. Directed by Anton Corbijn, the song features David Bowie on guest vocal duties on the James Murphy-produced song.

Meanwhile, pay a visit to justareflektor.com for more Arcade Fire interactive goodness.

The Reflektor will be released at the end of October.