To the shock of his family, Dr. Antony Kidman, actress Nicole Kidman's father, passed away in Singapore after suffering from a heart attack following a morning exercise on Friday.

Dr. Kidman, who was in his 80s, was an acclaimed clinical psychologist at Royal North Shore Hospital in Sydney, Australia.  In 2005, he was awarded an Order of Australia medal for his contributions to the field of psychology.

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While on vacation in Singapore to visit his daughter Antonia, the good doctor was exercising at the Tanglin Club. Upon entering the said club's Wheelhouse restaurant, he collapsed and died.

A spokesman for the Singapore Civil Defence Force said a call was received at 8:10 am, requesting for medical assistance.

People were already performing CPR on Kidman when paramedics arrived; however, he couldn't be saved and was pronounced dead at a local hospital.

A police spokesman said they are currently "investigating the unnatural death."

According to Nicole Kidman's rep, "Nicole and her family are in shock over the sudden death of her father. She appreciates the outpouring of support and kindly requests privacy during this very difficult time."

The actress found out about her father's death on Thursday night while at home in Nashville, Tennessee.

Keith Urban, Kidman's husband, cancelled his charity event performance at Sherwood Country Club in Thousand Oaks, California at the last minute so he could fly home to be with his wife.

Kidman was born in Hawaii while her parents were studying in the States. The young family then moved to Sydney when the actress was four years old. 

Nicole once opened up about one of the many important things her father taught her. "I'm not sure what the future holds but I do know that I'm going to be positive and not wake up feeling desperate. As my dad said 'Nic, it is what it is, it's not what it should have been, not what it could have been, it is what it is,'" she said.

TagsNicole Kidman