London, May 30 : American actress Nicole Richie is delighted that her rehab stint brought her warring parents back together.

Nicole adopted parents, singer Lionel Richie and mum Brenda, separated in 1988 when she was age five, ahead of the bitter divorce in 1993.

Lionel and wife were barely on speaking terms amid allegations of the singer''s infidelity.

In an interview to Larry King, the Simple Life star admits that relations between her parents begin to heal after she was admitted to rehab in Arizona in 2003 to battle substance abuse problems.

She is convinced that worrying about their daughter revived the bond between the former couple - who are now great friends.

"I think I was 20 when they started talking. And they actually didn''t start talking until I went to rehab. Now they''re best friends. And it''s really great," the Daily Express quoted Nicole as saying. (ANI)