The Oscar-nominated actor, now 32, opened up about how his mother Debbie died of a heroin overdose and how he had no relationship with his father.

Barry also spoke about being taken into care, remembering “all the different homes” from his childhood.

“It still haunts me, you don’t forget these things,” he told the Louis Theroux podcast about his mother’s death.

Speaking about being in care, Barry said: “Remember to wait on the steps of the social worker and wait for the new family to come and play with you in the playground they have at the office and see if it’s going to work, then go with them to a whole new area and a whole new house.

“And you know, the car goes there and those are the things that haunt.”

He said he did not “blame” his mother, who suffered from an “illness”.

“She was adorable,” he revealed. “She was stunning, almost six feet tall, with black hair, just stunning. Like all the boys were chasing her and this thing caught up to her, like a lot of families do.

“It’s sad to see the deterioration of people’s situation in the region and to see people struggling with this and with the recovery that they are in now. It caught my mother, my uncle who died from it and my father too.

“She was simply incapable of taking care of us,” he added. “My dad wasn’t there so we were picked up and no one knew.

“I think she was too embarrassed to tell my grandmother and so no one knew that that’s when we went through all of this. All the different houses.

Previously speaking about his mother, Barry revealed how he prayed to her “every day” after her death 19 years ago.

In May, the Saltburn actor attended the Cannes Film Festival where he wore a silver bracelet engraved with his mother’s name, Debbie.

He previously told Esquire how he chose the bracelet at random when choosing a costume for a film he was working on.

He said: “I said, ‘That’s my mother’s name. Debbie. It’s crazy, isn’t it? It’s a sign. It’s a fucking sign! This one day, it’s like… So I kept it. They said, “Where is the bracelet?” I said to myself, “I’m keeping this.”

In 2018, he spoke about the loss of his mother on The Late Late Show.

“It was something new and people didn’t know the effects of it,” he told then-host Ryan Tubridy.

“Drugs hit the area and it affected all the families and she was one of those arrested.

“I was living with my nanny at the time. I was 12 years old. She was very young. She was 31 years old. I have great memories of her and I am very proud of her.”

The actor also explained how he and his brother Eric were moved to 13 different foster families between the ages of five and 12 before moving in with their nanny Patricia, aunt Lorraine and older sister Gemma in the city center of Summerhill.

“We were placed in foster care and the families we went to were good to us. We went to a few of them. They kept us together, which was great.

“Every family was good to us. As a child, you don’t know what’s going on; you buckle up and then boom – let’s go this way.

“It’s weird. It’s only as we get older that we can look back and gain some perspective.

“So I don’t have a hometown,” he joked before adding, “I’m just messing around, I do.” Summerhill.”

The actor went on to star in international blockbusters like The Eternals and Batman before gaining critical acclaim for his role as Dominic Kearney in The Banshees of Inisherin.