Sienna Miller can “really relate” to Britney Spears

And now, Sienna has said she empathises with Britney’s situation, because she previously faced major public scrutiny which put her in “a perpetual state of anxiety”.

She said: “Everyone in the culture was complicit in what was being done to girls in that moment. I was definitely a victim of that, and I couldn’t handle it. I don’t know how anyone could. It was assault.

“I think the reaction from a lot of women under that kind of scrutiny at the time was to just lose it a little bit. You’re in a perpetual state of anxiety. You’re living this video-game existence, being hunted relentlessly. Watching the documentary, I could really relate to those moments where she cracks because it’s unmanageable. It is aggressive and terrifying and you lose control. That’s their intention.”

Thankfully for the 39-year-old actress, she was able to control her public image by heading to court to “fight” her way out.

Speaking to The Guardian newspaper, she added: “If someone backs me into a corner, I will fight my way out. I was young, and under real scrutiny at a moment where the culture was destructive. I didn’t want it, I fought it legally, and I triumphed.”

Meanwhile, Britney’s close friend Paris Hilton also recently spoke out to defend the singer following the release of the documentary, as she believes Britney is being "treated like a child".

She said: "I haven't spoken to her in a few months. I haven't even watched the film yet, because I've been so busy. But I heard it's just a really sad movie.

"It makes me really feel for her, because she's such a sweet girl and has such a big heart and I just can't imagine being controlled like that.

"You know, when you're an adult and you've worked your whole life for building this empire and then just to be treated like a child, it's just not fair."