Oscar winner Cate Blanchett revelation!

The secret behind Cate's 11 year marriage to hubby Andrew Upton - sex and lots of it!

She admitted here were no sparkage and power ballads initially at first meeting

"He thought I was aloof and I thought he was really a headache. Then we got to know each other -- annoyance at first sigh."

Now they've become perfect partners both in and out of bed.

"It's about rhythm," Cate divugled.

"I'm sure if you have a good sexual relationship, then you're in sync with one another. It's all about being in sync. "

"Love is tough," the star said.