Julia Roberts has been at the center of media speculation that she is pregnant with her fourth child.

However, it has been confirmed that there is no truth to the rumours.

The 46 year-old appeared on CBS' 'Late Show With David Letterman' this past Thursday (Dec 12th) and shot down any chatter of her expecting a new born.

"Have you thought about adding more to the group?" host David Letterman asked. "Any chance?"

A simple "No" was Roberts' reply.

The Oscar winner is already a mother of three children with husband Danny Moder, they have a six year-old son called Henry and nine year-old twins, Hazel and Phinnaeus.

Roberts' did reveal to Letterman the downsides of motherhood, "God, I hate homework" she said. "I hated it when I had to do it and now I hate it when they have to do it. When they come home from school, I want them back."

The 'Notting Hill' actress became the target of this week's pregnancy rumours when the paparazzi spotted her in a loosely fitted jacket and before you know it, the speculation spread like wildfire.

But as quickly as they started, Julia can now put them to an end.

The 'August: Osage County' actress' conversation was heavily based on being a mother and she insisted that her children do not know of their mom's worldwide fame.

"They know I'm their mother and they know that I work in show business, as does their father," she said of her husband, who works as a cameramen. When asked if they have seen any of her films, Roberts hastily replied, "Oh god no! No, no, no. No!"

There you have it, Julia Roberts is not pregnant and doesn't plan to be in the future.

Watch the full interview below