Katherine Heigl doesn't accept love at first sight

Katherine Heigl has revealed she doesn't believe in love at first sight and she credits pheromones for the attraction she felt towards her husband Josh Kelley.

Katherine Heigl doesn't believe in love at first sight.

The 'New Year's Eve' actress - who is married to musician Josh Kelley - thinks strong feelings grow over time but she accepts you can tell if you like someone as soon as you meet.

She said: "I don't believe in love at first sight. I think loves grows as you get to know the person. But definitely I believe in chemistry. You can be attracted to somebody and instantly feel something you've never felt before. I swear it's a pheromones thing. There is something about Josh that is so uniquely attractive and sexy to me. And he wasn't my usual type at all. I went for moody and mysterious guys, usually actors. Josh is so different from any man I know."

The former 'Grey's Anatomy' star - who has 23-month-old adopted daughter Naleigh with Josh - says her favourite thing about her handsome spouse is the fact he can always cheer her up.

She said: "He's really charming and gregarious and he's super-positive about everything - like if the weather is crappy he'll somehow make it a good thing."