Angelina Jolie has dismissed rumors that she and beau Brad Pitt will soon be on diaper duty again.

Jolie laughed off rumors that she and Brad were expecting their second biological child, but is not ruling out adding to the family sometime in the future.

"No, there's always a rumor but not at this moment. But at some point we will (have another child)," she told MTV News.

The couple are already parents to four kids - Maddox, Pax, Zahara and Shiloh.

Jolie adopted Maddox in March 2002 while still married to actor Billy Bob Thornton, however when the two split she got custody. She later revealed that Pitt had been the one to encourage her to adopt Zahara in July 2005.

After Pitt and she got together, the actor adopted both the children, and Jolie requested their names be officially changed to 'Jolie-Pitt' in January 2006.

Next came the couple's first biological child Shiloh, who was born in Namibia in May 2006. Jolie then added a second son to the family by adopting Pax Thien in March this year.