In an interview for the January 2012 issue of Marie Claire, Jolie says there is "nothing planned at the moment," as far as an addition to her family, "but we just don't know. I could end up pregnant."
Her comments echoed Pitt's response to an interviewer who asked him in November how big he wanted his family to be.
"You know, I don't know that we're finished," he said. "I don't know yet. I don't know."
Pitt, 47, and Jolie, 36, have six children ranging in age from three to 10. Three of the children are adopted and three are biological.
Whether or not they choose to expand their brood, Jolie told Marie Claire that Pitt "has expanded my life in ways I never imagined. We built a family. He is not just the love my life, he is my family. I hold that very dear."