Julia Roberts Shares Tip on How to Have a Successful Relationship

— -- Actress Julia Roberts is opening up about her family life, and sharing her secret to having a successful marriage.

While promoting her new film “Secret in Their Eyes,” for an interview with Extra's Mario Lopez, Roberts shared a tidbit of relationship advice for couples after Lopez asked the actress to reveal "a good tip for future entertainment couples."

"I don't think it's exclusive to entertainment couples," Roberts said. "I wouldn't even think of us as an entertainment couple, but I don't know. Probably kissing."

Roberts, 48, has been married to husband Danny Moder for 13 years, and the couple have three children together -- twins Hazel and Phinnaeus, 10, and son Henry, 8.

Roberts also explained to Lopez why she enjoyed working with Moder on the "Secrets in Their Eyes" film set.

“It was nice a lot of times if we got to go to work together and go home together. ... All that work time, when you come home and ‘oh, honey, how was your day?’... We did all that in the day and in the car, so when we got home we got to put that all away, which was really delightful,” Roberts said.