Reese Witherspoon is to play the lead in a new mystery called 'Whiteout'.

Variety reports that the 'Legally Blonde' star will play a US Marshal who has to solve a murder in the Antarctic before the sun sets for six months.

'Whiteout' is based on a series of acclaimed graphic novels by Greg Rucka.

Witherspoon's latest film 'Sweet Home Alabama' will be released in Ireland on 20 December.