(Cover) - EN Showbiz - Will Smith and Jada Pinkett Smith are so happy together because they make each other laugh.

The actor-and-rapper has been married to actress Jada for almost 13 years. They are widely regarded to be one of Hollywoods rare romantic success stories, and frequently discuss the secrets to their union.

Jada has claimed a healthy sex life keeps her close to Will, but a friend thinks something much simpler is at work. The pal says the couple never fail to make each other laugh.

They have also bonded over their children Jaden, 12, and nine-year-old Willow.

They laugh constantly, thats their secret, the source told Us Weekly magazine. And being parents is also an important bond for them.

Will and Jada are extremely proud of their children. Jaden recently completed his first serious acting job in the remake of the Karate Kid, while Willow has recorded a single after signing a record deal with Jay-Zs label.

Will is reportedly thrilled his children are following in his footsteps and cant wait to see how their careers pan out.

Their kids are the coolest ever. They are becoming little versions of them, the source added. (C) Cover Media