Although she was asked to gain weight for Transformers 2, it clearly looks as if Megan Fox’s waistline disappeared quickly.

In this picture, Fox is seen on the set of Jonah Hex, an adaptation of a DC Comics story. The Western features Josh Brolin as a bounty hunter (Hex) and Fox as his gun-wielding love interest. John Malkovich will play a voodoo practitioner trying to raise an army of the undead that will liberate the South.

Jonah Hex is scheduled for release on August 6, 2010.