Angelina Jolie says it's her job to love Brad Pitt

The 'By The Sea' director and actress, who married her co-star in the film in August 2014 after 10 years together, admits they don't always see eye-to-eye, but believes ''big fights'' make their relationship stronger. She said: ''It strengthens a relationship if you can pass those big fights and those big things where you really come head-to-head. ''As much as we can argue and fight, and we all have our challenges, at the end I say, 'My job is to love him.' '' The Oscar winner, 40, thinks the 52-year-old heartthrob gets better with age and is looking forward to growing old with him. She told PEOPLE magazine: ''I'm more interested in his 50-year-old self than his 40 year-old-self. ''And then you look forward to even more years together.