Courteney Cox says estranged husband David Arquette is her "best friend".

The 'Cougar Town' actress - who split from the star in 2010 after 11 years of marriage - explained "no matter what" happens in the future, the pair have vowed to always be close.

She said: "He's my best friend. No matter what happens in our future, he's my very best friend."

Despite the former couple's close relationship, Courteney - who runs production company Coquette Productions alongside David - insists new show 'Ten Year' is "not really" about their marriage, even though there are a number of stark similarities.

She told "We sold one show, 'Ten Year', about a couple who separated after 10 years of marriage.

"It's not really about David and me, but it's something we related to and we thought we should tell a story about people who could actually get along after being separated. It's telling a different version."

Courteney - who has a seven-year-old daughter, Coco, with David - previously admitted the couple are "closer than ever" following their split.

She explained: "The great thing is that even though we are separated, David and I are still so close. We're able to talk through everything that happens, so I know that we're often both feeling the same way and that makes me feel less alone.

"In some ways, we're closer than ever because we're communicating more than we ever have."