Channing Tatum discusses his secrets to a successful marriage in the current issue of Cosmopolitan magazine. The White House Down actor and wife Jenna Dewan-Tatum have been together for almost eight years and will soon welcome their first child together.

"You have to want it," Tatum explained of the key to a happy marriage, "Jenna's and my thing is checking in with each other all the time, like 'On a scale from 1 to 10, how much do you love me right now?' And you gotta be honest, and you've got to want an honest answer." Celebrity couples come and go and there's been a spate of high profile divorces in recent months - Tom Cruise, Courteney Cox, Mayim Bialik - though Tatum said it's important to stay grounded. "My friends keep me grounded. It's embarrassing to tell you how much my friends make fun of me," he said. "Seriously, when you have a doll made of your face, it's ridiculous how creative your friends can, videos, little animated cartoons they've made. And they're way, way not PG-13. So I get chopped down to size all the time."

In Roland Emmerich's new movie White House Down, Tatum plays a capitol policeman who is forced to spring into action when a family tour of the White House is interrupted by a heavily armed group of paramilitary invaders. Also starring Jamie Foxx, the movie hits theaters on June 4, 2013.

Watch the White House Down trailer:

Channing TatumChanning Tatum At The GI Joe Premiere