Ben Affleck and Matt Damon have been lifelong friends and worked together on numerous occasions. The 44-year-old actor admits he really values their connection as Matt has been with him though many “ups and downs.”

He told Entertainment Tonight: “I can’t tell you how valuable it is to have somebody who’s been through things with you, ups and downs, who knows what your life experience is like, who can identify with that.

It’s an incredibly valuable friendship and it’s very precious and so is my friendship with my brother. I don’t know what I would do without those guys.”

And Ben acknowledged his younger brother Casey, whom he says is too “savvy, smart and talented” to need any advice from him.

“He doesn’t need any advice. My brother is one of the smartest guys I know.

He’s savvy; he’s smart; he’s talented; he’s thoughtful. He just knows what he’s doing. He doesn’t need me to help him.”

Meanwhile, the star admitted he was nervous for Casey at the Golden Globes ceremony. However, he was relieved as the star won the award for Best Performance by an Actor in a Motion Picture – Drama for the film Manchester by the Sea.

In fact, Ben felt so relieved that he hurried home to ask his four-year-old son if he had witnessed the event on TV.

He explained: “I was more nervous for him than I ever have been for myself. My kids stayed up to watch it.

I went home today and I asked my four-year-old, ‘Sam, did you see Uncle Casey up there? Did you see what happened?’ And he said, ‘The man said Casey Affleck!'”