NICOLE'S SECRET ENGAGEMENT

In the new issue of Vanity Fair, Nicole Kidman reveals that she was engaged to someone in between Tom Cruise and Keith Urban.

Of that relationship, she say, "I got engaged to somebody ... but it just wasn't right. I wasn't ready. We weren't ready."

Now, the New York Post is reporting that the man Kidman was briefly affianced to is Lenny Kravitz.

"They were even house-hunting together for a while," a source tells the paper.

THA CHIEF WOULD HAVE PICKED LENNY OVER KEITH.