Jennifer Aniston and Justin Theroux's peaceful wedding

Justin Theroux says his 2015 wedding to Jennifer Aniston was "so much more special" because they kept it secret.

The 'Leftovers' actor tied the knot with the 'Friends' star in August 2015 in front of their closest family and friends and the pair particularly wanted to keep it secret in the run-up to the big event as they wanted the wedding to be "peaceful" rather than hectic.

He told Entertainment Tonight: "It's so much more special when it's just your closest friends and family and it's lovely.[Jennifer and I] wanted it to be a peaceful environment, you don't want it to be hectic."

Meanwhile, the 45-year-old actor previously admitted being kind is the secret to a happy marriage.

He shared: "Being kind, that's it. I think that's the best one. Approach each situation with kindness ...

"There's no such thing as a perfect couple, but there are couples that can be good together. We appreciate each other's sense of humour, we respect one another, and we get along. It sounds simple, but it's true."

And Justin recently admitted being married to Jennifer, 48, has had a calming effect on him.

He shared: "Obviously, I'm married. I think marriage taught me to settle a little bit. It does have a calming effect. I think it's at what age you make that commitment. When you hear about people in the '50s getting married at 20, you're like, What were they thinking?

"My grandparents were together for over 50 years. My grandfather used to write one sentence every day in his journal: 'I love Anne more than ever today.' I think that was his meditation - keeping him in his marriage, and also his appreciation for it. It was very touching."