Marrying Jennifer Aniston had a calming effect on Justin Theroux

Actor Justin Theroux says getting married to former Friends star Jennifer Aniston has a calming effect on him.

The 45-year-old star revealed that his year-old marriage with Aniston, 47, has settled him down and he could not be happier, reported FemaleFirst.

"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," he said.

Citing his grandparents' successful marriage, Theroux said, "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 line everyday 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," he added.