The actor also discussed his approaching 15th wedding anniversary with Catherine Zeta-Jones
Credit: Chris Pizzello/AP

Michael Douglas says he is still coming to terms with the death of his mother, Diana Douglas Webster, who died from cancer at 92 on July 4, but has fond memories to share.

“I’m still digesting it. It just sort of happened,” the actor, 70, told PEOPLE at the New York City premiere of Ant-Man on Monday night.

“[She had a] wicked sense of humor, very bright,” he went on about the actress.

Webster, who was the ex-wife of Kirk Douglas, was a stage and screen actress in more than 80 roles. But it wasn’t tricks of their trade that Douglas took away from the relationship.

“I don’t know how much she taught about acting. She just taught me more about giving it your best shot. She’s English and Bermudian, so they have kind of this stiff upper lip and can carry on,” Douglas explained.

The star also discussed Webster’s memory in an interview with ITV’s Lorraine, telling the news outlet that he has plans to head to Bermuda to honor her.

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“I was raised there with my mother and I’ll be taking her ashes back to Bermuda soon,” he said in the Tuesday interview.

Douglas also discussed his approaching wedding anniversary with Catherine Zeta-Jones, 45, later this year. The couple, who went through a brief public split in 2013, celebrate their 15th anniversary on Nov. 18.

“We are really, really happy and enjoying our time together and enjoying [time] with the kids, it’s a great time.”

The couple are parents to Carys, 12, and Dylan, 14.