Los Angeles, Jun 2 (IANS): Actress Heather Graham's parents Joan and Jim Graham miss their daughter, whom they have not met in years and don't know why she cut off all ties with them.

Heather, 43, is known for working in movies like "Boogie Nights", "Austin Powers: The Spy Who Shagged Me" and "The Hangover".

"Joan and I have endured many sleepless nights questioning how and why it all went wrong. To this day, we honestly don’t know. As a family we were incredibly close, Heather would always share everything with us," thesun.co.uk quoted Jim as saying.

“But suddenly, almost overnight, everything changed and it is a mystery to all the family how a girl who loved us all seemed to distance herself for no real reason," Jim added.

However, the couple is hopeful that one day things will be alright between them and Heather.

“Not a day goes by when we don’t miss Heather. I just hope that one day the phone will ring and it will be her voice at the end of the line," Joan said.