Angelina Jolie tells of development of relationship with Brad Pitt

Angelina Jolie said she wasn't looking for love when she was working on Mr. & Mrs. Smith alongside Brad Pitt, but the two remained "very, very good friends" after shooting the movie.

She didn't know where Pitt was in his personal life, Jolie told Vogue in its January issue that hits newsstands on Friday. Pitt was still married to Jennifer Aniston at the time of the film's shooting.

"I think we were both the last two people who were looking for a relationship. I certainly wasn't. I was quite content to be a single mom," Jolie tells the magazine.

"Because of the film we ended up being brought together to do all these crazy things, and I think we found this strange friendship and partnership that kind of just suddenly happened," she says.

Pitt has denied Jolie was the reason behind his separation from Aniston.

Jolie said it was one of her children who helped cement the relationship between her and Pitt.

One day, Maddox "just out of the blue called him Dad. It was amazing. We were playing with cars on the floor of a hotel room, and we both heard it and didn't say anything and just looked at each other."

"So that was probably the most defining moment, when he decided that we would all be a family."