Justin Theroux says marriage has had a "calming effect" on him.

Justin Theroux

Justin Theroux

The 45-year-old actor has been married to Jennifer Aniston for a year and revealed that he couldn't be happier.

When asked if he believes in monogamy, Justin told US Elle magazine: "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."

While Justin loves being married to Jennifer, 47, he admitted that their high-profile relationship does present some problems.

He explained: "It's a luxury problem, but I would love to walk around New York with my wife. Take her to Washington Square Park.

"What would happen if we just did that? It would turn into a s**t show. It would be not fun."

Meanwhile, the hunky actor admitted he was left embarrassed by a scene in his TV show 'The Leftovers', in which his character goes jogging in a pair of revealing sweatpants.

He explained: "I don't want to say objectified, but it was embarrassing. It's like having someone yank your shorts down in public. It doesn't feel great. Anyone who has an unflattering picture taken of them would probably say, 'Join the club.'

"It has the appearance of a compliment, but it's more mortifying than anything else."