January Jones goes topless to play prostitute in new western Sweet Vengeance

We're used to seeing January Jones playing uptight housewife Betty in Mad Men.

However, her latest film role sees the actress play a feisty, gun-toting prostitute, who is so comfortable in her own skin she goes topless.

New Western Sweet Vengeane, which also goes by the title Sweetwater, sees the 35-year-old play Sarah, who is left widowed when her husband is killed.

Distraught at the loss, Sarah goes on a mission to seek revenge against those who wronged her and her husband.

As the trailer shows, there is plenty of gun-toting, blood and nudity during Sarah's quest for vengeance.

In one scene, it looks like Sarah may be interrupted during a wash in a waterhole as she points a gun at someone while topless.

The film, directed by Logan Miller, also stars Jason Issacs as a fanatical religious leader Prophet Josiah and Ed Harris as renegade Sheriff Jackson.

The film, set in the late 1800s, sees January dye her ice blonde hair to red.

Meanwhile, January recently discussed her decision to keep the father of her son Xander private.

She told Net-A-Porter's The Edit: 'It's just not something the public needs to know.