Irish actor, Pierce Brosnan, was in London this week and told reporters he found it exceptionally difficult making his new movie, "The Greatest," because it brought up strong emotions surrounding a near-fatal car crash his son was involved in.

Brosnan, 56, said after initially reading writer-director Shana Feste's script, he tossed it under the bed.

"I found it too heavy," he admitted.

After a little persuasion he agreed to do the movie but knew it would be a challenging one.

“This young woman had written this beautiful script, called "The Greatest" and it’s about the loss of a son and my son, Sean, I almost lost him a number of years ago in a terrible accident,” he said.

“You get that dreadful call at 4.30 in the morning and he got airlifted out and he survived, and this film is about the loss of a son and the family coming together again." he added.

“When I read it I said, ‘No, I don’t wanna go there, it’s too heavy,’ and threw it under the bed and then my partner… said, ‘Look, check it out again, You’ve gotta do this,’ so I read it again and said, ‘OK, let’s go for it.’”

Brosnan added: “It’s a beautiful film… It’s a really tender, powerful film.”

"The Greatest" will hit movie theaters on April 2.

The Greatest: Pierce Brosnan and Susan Sarandon share a passionate embrace in new movie, 'The Greatest'