HOLLYWOOD — Kate Hudson's new comedy "How to Lose a Guy in 10 Days" is all about the don'ts of dating. Hudson and Matthew McConaughey purposefully break several dating rules in the flick, but Hudson says that in real life, husband Chris Robinson broke them all.

"There was one time where I think he was under the influence of alcohol [when] he called," she said of the former Black Crowes frontman, relaxing at the Four Seasons earlier this week. "It was like four days into knowing each other and [he] told me he loved me. It was four days. And I went, 'Oh my God, I love you too.' And I did. And that was that.

"It's funny because when I met Chris, every rule that could have ever been in the book was gone," she continued. "Everything that we did [was something] that every person would say to you, 'Don't ever do this.' I moved in four days later. Right after that phone call — on a plane, moved in, dog and all."

Hudson and Robinson attended the movie's premiere on Monday, traipsing down the red carpet along with co-star McConaughey (click for photos).

"How to Lose a Guy in 10 Days" is loosely based on a short book of the same name, written by music industry workers Michele Alexander and Jeannie Long. Illustrated with stick-figure drawings, the book is a step-by-step guide that includes such lose-your-guy instructions as "leave an article of clothing," "ask him if you look fat" and "make him a mixtape of 'your' songs."

"In the first couple of weeks, mixtapes can send you running," Hudson agreed. "I did that! I actually did do that [with an old boyfriend]. And actually one of Chris' songs was on my mixtape."

If she made her current man a mixtape, it wouldn't contain any Black Crowes. "I would definitely not put on 'She Talks to Angels,' " joked the "Almost Famous" actress, whose most recent film was "The Four Feathers." "I would probably put on a lot of jazz — Thelonious Monk, Coltrane, Jimmy Smith. You know, the good ol' stuff."

Hudson, Robinson and McConaughey were joined on the red carpet Monday by co-stars Bebe Neuwirth (TV's "Cheers"), Shalom Harlow ("Vanilla Sky") and Michael Michele ("Ali") as well as Judy Greer ("Adaptation"), the Beu Sisters and Rosanna Arquette ("Pulp Fiction"), among others.

Though "How to Lose a Guy in 10 Days" isn't even out yet (it opens Friday), Hudson has already completed work on another film, called "Loosely Based on a True Love Story," co-starring Luke Wilson ("Legally Blonde") and directed by Rob Reiner ("When Harry Met Sally").

"I get to play five different characters in the movie, all an extension of the same character," Hudson said. "But she becomes Swedish, German and Spanish, and then American, all in the '20s and then in the modern day. It was such a great experience. Working with Rob Reiner was just amazing. And Luke being a friend of mine for almost five years now — we finally got to work together and it was just so great."