Jennifer Aniston got to act out her mommy fantasies on the set of the The Baster on Wednesday.

The actress – who has spoken about her desire to start a family – hung out on set with a young co-star while filming scenes for the upcoming comedy in New York.

The pair appeared to be getting along swimmingly as the Marley & Me star sat on a step outside a Brooklyn brownstone with the little girl perched on her lap.

Meanwhile, Jen's co-star Jason Bateman was having a cute family moment of his own – but this one wasn't just for the benefit of the movie cameras.

The actor was spotted carrying his two-year-old daughter, Francesca, on his shoulders while on break from shooting.

In The Baster, Jen plays an aging singleton who is so desperate to have a child that she resorts to using a turkey baster to get pregnant.

It's a family affair for Jen & Jason below