Sir Michael Caine's "business" relationship with his wife is the secret to their successful marriage.
Shakira Caine and Sir Michael Caine
The 'Interstellar' star has joked that his 42-year marriage to Shakira Caine is so great because she answers his emails.
He explained to Germany's Reader's Digest magazine: "It's not just a partnership built on love; it's also a business partnership.
"I'll only answer the phone in an emergency. And unlike her, I wouldn't even know how to answer an email!"
And the 82-year-old star also praised his "beautiful" wife.
He added: "It's also very helpful when you marry the most beautiful woman you've ever seen in your life - that's true for me even today."
Meanwhile, Michael previously insisted he has never been "tempted to stray" from his wife.
He said: "In this business, you're surrounded by beautiful women - but I've got one at home, so I've never been tempted to stray.
"We also pre-empted any of that kind of danger because I never went on location without her. Going on location is a killer: Among actors they say, 'Well, location doesn't count. I never went with that saying, because I never went on location without her. Simple."
Michael has two children, daughter Natasha with Shakira and daughter Dominique from his previous marriage to Patricia Haines.
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