Actor Liam Neeson opened up to "60 Minutes" about the death of his late wife Natasha Richardson, ABC News reported.

"[Her death] was never real. It still kind of isn't," he said in the interview, to be aired on Sunday. "There's periods now in our New York residence when I hear the door opening, especially the first couple of years ... anytime I hear that door opening, I still think I'm going to hear her."

He also discussed hearing doctors at the hospital in Canada tell him Richardson, 45, was brain dead following a fall on the ski slopes with her children in Quebec's Mount Tremblant.

"She was on life support," he told "60 Minutes." "I went in to her and I told her I loved her, said, 'Sweetie, you're not coming back from this, you've banged your head.'" 

Neeson, 61, said he knew his wife and mother of his two kids wouldn't recover from the incident.

"She and I had made a pact, if any of us got into a vegetative state that we'd pull the plug," he said. "That was my immediate thought ... 'O.K., these tubes have to go. She's gone.'"

However, he kept her on life support long enough to bring her back to the U.S. for family and friends to say their goodbyes. Richardson passed away two days later on March 18, 2009. 

He also added Richardson donated her organs and because of her, three people are alive today.

"Donated three of her organs, so she's keeping three people alive at the moment ... her heart, her kidneys and her liver," Neeson said. "It's terrific ... and I think she would be very thrilled and pleased by that."