Keira Knightley and her rocker husband James Righton's starring roles in their kids' school nativity are revealed

Keira Knightley and her rocker husband James Righton's starring roles in their kids' school nativity have been revealed.

The actress, 39, is married to Klaxons musician James, 41, and the couple share children Edie, nine, and Delilah, four. 

And sources at the fancy London school they attend have told how James had pulled out all the stops for the show after taking a starring role in last year's carol concert.

An insider told The Sun: 'James is absolutely brilliant and was really involved with the nativity this year.

'Last year, he got up on stage and performed during the service, which was amazing. None of us could quite believe it, and Keira was in the audience cheering him on.

'This year, he has sprinkled some magic over the nativity, but let the kids take centre stage. It was magical and so special to see.'

It comes after Keira joked that her marriage to husband James will only survive if he follows one very strict rule over Christmas.   

The pair were married in 2013 in the South of France, where she wore Chanel couture as they exchanged vows in front of eleven guests.

The couple tend to keep their private life under wraps, but in a new interview, the actress gave a rare comment about her musician partner as she opened up about their traditions over Christmas.

Speaking to Nick Grimshaw on his BBC Radio 6 show on Thursday, Keira sarcastically quipped that the pair would be headed for 'divorce' if James' OCD spilled out of the kitchen on Christmas Day. 

The thespian, who is currently starring in new Netflix thriller series Black Doves, revealed that while she doesn't partake in the cooking on the day, her husband takes charge instead, but can be very particular when it comes to the kitchen.

Detailing the drama, Keira told Nick: 'He's the cook! he's a good cook. He loves food, he's a good cook and he's also a little bit OCD so as long as the OCD stays in the kitchen, then the marriage survives! 

'He's allowed to be as OCD as he likes in the kitchen but it's not allowed to come out of the kitchen! But that does mean Christmas dinner will be very very good.'

As Nick told how it's good to have a barrier, Keira agreed, responding: 'We have found like as far as trying to keep a relationship, you know OK for a while, if one person does have a bit of OCD, you have to give them paces where it's allowed. 

'And then places where it's not allowed! So I feel like the kitchen is a good place for OCD. 

'If it comes into the living room, not happy', she then laughed as she added: 'Divorce!  Unfortunately.'

It comes after Keira insisted that she can't walk in heels anymore and will never wear a crop top again.

The actress has reflected on her iconic noughties fashion in a recent interview where she declared: 'It was all about my midriff!'

She was known for wearing tiny tops, low slung denim and skinny scarves after bursting into the spotlight in her late teens. 

One of her most famous roles also includes playing Juliette in the 2002 film Bend It Like Beckham where she was often seen wearing a sports bra.

She told The Times that she recently saw a group of teenage girls on the tube wearing a similar style and thought: 'I was like, 'Hang on, are they my clothes?' 

'I don't have the midriff any more, so it's not coming out.'

Since having kids she told how she has a much more practical style and loves her Dr Martens boots more than anything.

She told the publication: 'I've got a brown pair and a black pair, and it's very hard to ever take them off. I've no idea how to walk in heels any more.'

Keira was speaking to the publication to promote her new series Black Doves.