The Australian actress, who will be contesting her fourth nomination at the Oscars later this month, revealed she was in fact due to wed her former flame, Kravitz.

Kidman dated the singer from 2003 to 2004, two years after the end of her marriage to actor Tom Cruise.

She broke the news in an interview with The Edit, published this week, while speaking about working with Kravitz's daughter, Zoe in the television adaptation of Australian author Liane Moriarty's book, Big Little Lies.

"Well, I knew Zoe because I was engaged to her father," Kidman said. "It's all in the family!"

The Lion actress added that she and Kravitz were still on good terms.

"I love Lenny," she said. "He's a great guy."

In a 2007 Vanity Fair interview, Kidman had revealed she was engaged to be wed to someone prior to her current husband, country music singer Keith Urban, however she did not reveal their identity.

There were a number of former flames who could have been the mystery fiance: Kidman is thought to have dated rapper Q-Tip, actor Adrien Brody and singer Robbie Williams in between her marriages to Cruise and Urban.

Fairfax Media