Nina Dobrev and Ian Somerhalder
Canadian actress Nina Dobrev sits court side with Ian Somerhalder during Game 5 of the NBA Western Conference final playoff series between the Los Angeles Lakers and the Phoenix Suns in Los Angeles.Reuters

While it's difficult to remain friends with your ex after a break-up, considering all the time and emotion invested into the relationship, it is not difficult to maintain a cordial relationship with your former significant other.

On the occasion of this International Friendship Day, which fans on the first Sunday of August, we take a look at some celebrities who have a good relationship with their exes.

Gwyneth Paltrow and Chris Martin: The Coldplay frontman and the "Iron Man" actress consciously uncoupled in 2014, but Martin is still close to his ex and they share a great bond. They are often spotted vacationing together.

Nina Dobrev and Ian Somerhalder: "The Vampire Diaries" actors called off their relationship in 2013 after dating for almost three years, and according to Dobrev, they still share a great relationship.

"I've said this before, that we didn't break up because anything bad happened or because there wasn't love or friendship," Dobrev told E!News. "I love him and the friendship is still strong and I think he's great and I care about him. And that didn't change. Yes, we're professional and that's fine. We were friends long before we dated and we still are now."

Cameron Diaz and Justin Timberlake: Although the couple parted ways in 2006 after being together for three years, they went on to act together in "Bad Teacher" in 2011. According to Diaz, working with her ex was anything but weird.

"No, it's great. Justin and I have always had a good laugh together, and to make a movie where we get to have a laugh together, and there really was no one else who was more perfect for this part," Diaz told

Hilary Duff and Mike Comrie: The duo called it quits on their romance three years after they got married. But Comrie is still a part of her life, and her Instagram account is testimony to that.

"We are good friends and we laugh a lot," Duff told talk show host Ellen DeGeneres about her relationship with her ex. "And we have a great communication and we share pictures when one is not with Luca. He's great, we are great and we keep on trucking."