United Kingdom, June 16 -- Kevin Costner's biggest challenge as a dad-of-seven is gathering all of his children together in the same place at the same time.

The Hollywood actor, 70, is father to three adult children - Joe, Annie and Lily - with his first wife Cindy Silva as well as son Liam from his relationship with Bridget Rooney and he's also dad to three teenager - Grace, Cayden and Hayes - with his second wife Christine Baumgartner and he admits having such a big family has its challenges.

He told PEOPLE: "It's here and there now. Trying to gather them all [together at the same time] is very difficult as they all move through the directions of their life."

However, Costner tries to make his homes as welcoming as possible so the ki...