"Right after I met [Cash], I called my best friend and was like, 'I met this guy and I feel like I've known him forever and I'm gonna know him for the rest of my life," Alba, 29, says in the September issue of Cosmopolitan magazine.
Instant connections only get couples so far, but after four years of dating, two years of marriage, and a 2-year-old daughter Honor Marie, Alba says Warren is much more than just that guy she hit things off with instantly.
"The romantic stuff comes and goes, but it's like, does that person have your back?" she says. "You have to be a team navigating through wherever life may lead you and I want a friend for that."