What could have been the secret to Rachel Weisz and Daniel Craig's successful union considering that they have been married for more than four years now?

Citing a report by "Hello!" magazine, the Indian Express shared that the 45-year-old "The Mummy Returns" star is protective of her marriage.

The British-American actress pointed out that being married does not mean that one needs to let everyone know about everything that is going on under his or her roof.

"You have to protect your marriage," Rachel Weisz revealed about her relationship with Daniel Craig. "When you're young, you tell your girlfriends everything."

She also emphasized that as an adolescent, "you don't have to share everything."

"When you're married, that door closes. The audience goes, and you're in your own life," the "Enemy at the Gates" star stated.

On the other hand, the multi-awarded actress admitted to "Hello!" magazine (as shared by the Belfast Telegraph) as well that she does not know James Bond, the role that her husband has been famous for.

"I don't know James Bond personally and as far as I understand he doesn't really get married, does he?" Rachel Weisz told the magazine when prodded about how it is to be living together with the world's ever-famous spy, as portrayed by James Craig in the "007" films "Casino Royale" and "Spectre."

"I don't live with James Bond, I like with an actor called Daniel Craig who is such a brilliant actor that he has convinced everyone else that that is who he is," she further narrated to the British publication.

Being married to the 47-year-old actor, according to the "The Constant Gardener" actress, has been giving her so much happiness.

"Let's just say I've got no complaints (with my life)," dished Rachel Weisz, who got married to Daniel Craig in June 2011. "Life is good and I'm very, very happy."