Michelle Monaghan joins Due Date

She'll co-star with Robert Downey Jr

Hangover director Todd Phillips has added Michelle Monaghan to the cast of his new comedy, Due Date.

She'll co-star alongside Robert Downey Jr as his pregnant wife.

The mismatched traveling partners comedy (think something along the lines of Planes, Trains & Automobiles) sees Downey Jr racing home to arrive before she gives birth to their first child - and picking up weirdo Zach Galifianakis along the way.

It'll kick off shooting next week...

[Source: Variety]

Does it sound like another winner from the Hangover team? Tell us!