Matthew McConaughey says "respect, a sense of humour and communication" are the keys to a successful marriage.

Matthew McConaughey

Matthew McConaughey

The 50-year-old actor tied the knot with Camila Alves in 2012 and explained they work hard to keep their marriage strong.

He told Australia's Who magazine: "Respect, a sense of humour and communication. We’re raising three children right now and you can become consumed with that because they need you. Your husband or wife doesn’t really need you, he/she will be OK and all of a sudden it’s 10 pm after the third day in a row and they ask, 'How are you doing?' And you’re like, "Whoa, where did the day go? We haven’t checked in."

He also revealed that Camila is good at helping him to focus on their relationship, even though they have three children, Levi, Livingston and Vida, together.

He said: "She’s very good at reminding me to remember we’re first. We made them; they wouldn’t be here without us. That’s one of the challenges of raising kids: to remember the best example you can really give your children for how to be is to love their mother and for their mother to love their father, and for them to see that."