Nicole Richie

Nicole Richie to Sit Down with Diane Sawyer

07/26/2007 at 08:00 AM EDT

Nicole Richie will go one-on-one with ABC's Diane Sawyer next week, speaking for the first time since rumors started swirling that she is pregnant, a source tells PEOPLE.

Richie's interview will air in two segments on Good Morning America, Aug. 2 and 3, as well as on 20/20, Aug. 3.

Aug. 16, Richie, 25, also is due in court to face a DUI charge.