Lena Headey says her divorce was ''tough.''

The 'Game of Thrones' star, who is currently expecting her second child with a mystery man, admits her split from musician ex-husband Peter Loughran in 2011 after four years of marriage took a toll on her.

She said: ''It's tough. There's a lot of sadness and disappointment.''

But the 41-year-old actress, who has battled depression in the past, credits their five-year-old son, Wylie, for helping her to get over their split.

She told the April issue of MORE magazine: ''I haven't had a spell in a long time. I think some people's brains are just wired that way if you're a thinker. People who never get anxious always amaze me. The world could be breaking up and they're saying, 'Everything's fine!' Getting older and having kids, you learn how to become less serious about it all.''

Meanwhile the British beauty, who plays Cersei Lannister in the HBO drama series, admits she is addicted to tattoos.

She said: ''I always want more. It's a terrible thing. I'll be outside a tattoo shop and hear the needle and think, 'I could just get a little one that nobody would see ...'

''It's something you can't run from. You have to sit and find a way through [the discomfort]. I find a real calm, a real peace to it.''