For Angelina Jolie and Brad Pitt, happiness is a warm gun.

In an interview published in the upcoming issue of Vanity Fair, Jolie says she and Pitt came to trust each other while taking gun training for the upcoming Mr. and Mrs. Smith. They play married assassins in the movie.

"You had to trust each other to cross under or over and only move when the other person moves, so the trust, when somebody's got a loaded gun at your back. ... It made us trust each other quickly," Jolie said in the magazine, on newsstands from May 10. Neither Pitt nor Jolie has confirmed reports that they are dating. Last week, photos were published showing them on a beach in Africa with Jolie's 3-year-old son Maddox.

Pitt, 41, and his wife, Jennifer Aniston, separated in January after 4 years of marriage. Aniston, 36, filed for divorce in March, citing irreconcilable differences.

In the Vanity Fair interview, Jolie denied that she had said she was a shoulder for Pitt to cry on.

"I knew nothing about their marriage. ... It's obviously been difficult with all this ... going on," the 29-year-old Jolie said. "I've been tied to everybody I ever worked with." She also discussed her recent preference for having a lover, rather than a committed relationship. "I think women are much easier about having a lover than a man is, even," Jolie said. Her marriages to Jonny Lee Miller and Billy Bob Thornton ended in divorce.