Julia Roberts has been the subject of pregnancy and baby bump rumors all week, but the actress set the record straight when she was a guest on The Late Show with David Letterman on Thursday, Dec. 12.

After she was photographed on Sunday with a bigger-than-usual stomach under a baggy sweater, reports circulated that the August: Osage County star may be pregnant at 46 with her fourth child. The photos were taken when Roberts and her husband, Danny Moder, visited his parents' home in Los Angeles.

However, Roberts denied she is expanding her family with Moder. Dressed in a black trouser suit, she give a firm "no" when Letterman asked if there was any chance she is currently expecting. Roberts, who married Moder in 2002, already have 9-year-old twins Hazel and Phinnaeus, and 6-year-old Henry. 

Letterman talked about Roberts' family and then asked, "Have you thought about adding more to the group?" She gave a polite but coy reply, smiling as she said, "Oh sure." When Letterman asked "any chance?" Roberts declared "No."

The mother-of-three also talking with Letterman about her new movie August: Osage County, for which she received a Golden Globe nomination this week.

Letterman later on in the show apologized for forgetting Roberts' birthday this year. It was revealed that the late night talk show host sent Roberts flowers every year on her birthday for 15 years, but this time he forgot. When Roberts asked him not to fire his secretary for forgetting to send them, the host yelled, "Alright bring in the flowers" and his stage hands delivering a huge bouquet to Roberts.

"I feel like Miss America," she gushed as more and more flowers arrived throughout the interview.

Watch Roberts' full interview with Letterman here.

Following the show's taping Roberts attended the New York premiere of August: Osage County. She walked the red carpet at the Ziegfeld Theater in a short blue dress. 

Tags: Julia Roberts