Sean Astin Describes Patty Duke's Peaceful Final Moments

Actor says his mom, who died earlier this week, had "suffered terribly."

"She was surrounded by her family. It was in the middle of the night and it was a race to get there," Astin, 45, told "Entertainment Tonight" in an exclusive on-camera interview. "It was a very powerful experience. And then, in her last moments, she was at peace."

He added, "She had been suffering terribly."

Astin, star of "The Goonies" and "Lord of the Rings," released a statement Wednesday, on behalf of the family, following his mother's death.

"This morning, our beloved wife, mother, grandmother, matriarch and the exquisite artist, humanitarian, and champion for mental health, Anna 'PATTY DUKE' Pearce, closed her eyes, quieted her pain and ascended to a beautiful place," the family statement read. "We celebrate the infinite love and compassion she shared through her work and throughout her life."

"I love you mom," added Astin.

"The way that I think of my mother, the thing that gives me such joy and reverence for her," Astin told "Entertainment Tonight," "is that, above all else, she was a warrior."