Nicole Kidman's Dad Dies Unexpectedly In Singapore

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Police are investigating the death of Nicole Kidman's dad Dr. Anthony Kidman.

The Oscar winner's father--a clinic psychologist at the University of Technology in Sydney, Australia-- was visiting Nicole's sister Antonia who lives in Singapore, Reuters reports.

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"It is with great sadness that we learn of Dr. Tony Kidman's sudden passing. During his 43 years at the University of Technology, Sydney, Tony has contributed greatly – as a colleague, as a researcher, and as a health practitioner," Vice-Chancellor Professor Attila Brungs said in a statement. "Tony will be missed by all at UTS. Our thoughts are with his family at this time."

Police have confirmed that a man in his 80s was pronounced dead in the hospital due to an "unnatural death."

One of the last times ET spoke with the 47-year-old actress was when she was promoting her film Grace of Monaco. See, below: