Ben Affleck
Batman star Ben Affleck said reports of an affair with nanny Christine Ouzounian are 'garbage' Reuters/Suzanne Plunkett

Soon-to-be-divorced actor Ben Affleck, who is about to appear on the big screen as Batman, says he's OK with estranged wife Jennifer Garner dissecting their failed marriage in a tell-all interview in Vanity Fair.

Garner, 43, is "allowed" to open up about their split, the nanny scandal, and the fact that the actress isn't a big fan of the phoenix tattoo that covers his back, Affleck said.

"She felt like she wanted to discuss it and get it out there and get it over with," the 43-year-old actor told the New York Times, "so she could say: 'Look, I already talked about it, I don't want to do it again.' It's fine. She's allowed to talk about it."

That's not to say he's thrilled about it. "It never seems like a great time to have your privacy invaded," he noted. "Obviously this is a particularly hard time."

Garner went deep in her interview with Vanity Fair, which touted the talk on its cover and headlined it as Jennifer Garner on the Rebound.

But the tell-all was actually relatively easy on Affleck. Despite chatter about an affair between her husband and their 28-year-old nanny (which Affleck has denied), she claims the younger woman was not the reason they decided to divorce after 10 years of marriage.

"We had been separated for months before I ever heard about the nanny," said Garner. "She had nothing to do with our decision to divorce. She was not a part of the equation. Bad judgment? Yes. It's not great for your kids for [a nanny] to disappear from their lives."

Garner described Affleck as the "love of [her] life". The worst she had to say about Affleck is that he's a "complicated" character that left her feeling "cold".

"He's the most brilliant person in any room, the most charismatic, the most generous," she told the magazine. "He's just a complicated guy. I always say: 'When his sun shines on you, you feel it.' But when the sun is shining elsewhere, it's cold. He can cast quite a shadow."

Despite the strain in the wake of the failed marriage, Garner and their three children plan to visit Affleck during the filming of his upcoming Justice League so they can vacation in Europe as a family, he said.

Affleck added: "Jen's great. She's a great person. We're on great terms. I just saw her this morning, so that's the reality that I live in."