The 41-year-old Lewis star – who is father to sons Winston, 11, and Eugene, seven, with ex-wife Billie Piper – has been sent death threats and admitted it made him worry for the safety of his children.
Fox told Good Morning Britain: “I have a small bout of, hopefully, temporary insomnia. I’ve had death threats and I have got children. I’ve had death threats, yeah, [in the last week] and it’s not pleasant.”
Fox has reposted some of the death threats he has received on social media.
But the actor and musician insisted he did not regret anything he said on the BBC debate programme – which included accusing an audience member later revealed to be a university lecturer and race and ethnicity researcher of being “racist” for suggesting he was a privileged white male.
He said: “What I said on Question Time, I 100% stand behind. I said what I felt and I continue to believe it.”
Asked if he was worried that his recent controversial comments might jeopardise his acting career, he said: “We will have to wait and see, but does one want to work in a career where you have to have the right opinions. I don’t. I don’t think art is going to be improved if everyone has exactly the same opinion.”
Fox is a member of the Fox acting dynasty – his father is James Fox, his uncle is Edward Fox and his cousins are Freddie and Emilia Fox.