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.