Starring in a succession of prime-time dramas, including The Field Of Blood and The Guilty and as socialite Lady Mae in Mr Selfridge (a role she reprises in January for series four), she has made the rare transition from soap star to serious actress. But Katherine, 35, admitted recently her most challenging role has been becoming a mother.
In 2013, she married her partner of three years, digital analyst Ryan Clark and baby Orla was born in March the following year. Not that it shows. Katherine, who is currently filming BBC1 espionage drama The Night Manager, was recently seen on ITV’s Loose Women flaunting a slim body and toned tummy in skinny jeans and a navel-grazing top.
Here, Katherine reveals her secrets to staying in shape and looking good.
“My wardrobe is multifunctional. I have clothes that work for different occasions”
Which beauty products do you swear by?
I love the Sarah Chapman Skinesis range. It has transformed my skin. I’ve also discovered the Aromachologie collection by L’Occitane.
I love the Rebalancing Massage Cream, which soothes my legs after a long day on set. And I never leave home without L’Occitane Shea Butter hand cream.
What are your essential cosmetics?
I wear so much make-up on set I try to give my skin a break on my days off.
I love Youngblood Foundation, though, it’s the best mineral foundation I’ve found and it’s so light you don’t feel like you are wearing anything at all.
Do you have any top beauty tips?
Sleep, a good facialist and hydration. I go to Sarah Chapman’s clinic in Sloane Square, London, for facials.
These days, chasing after my daughter or by pushing a pram round the park.
Do you diet?
I don’t talk about diets. I think there is too much pressure on people, especially young people, these days. There is so much more to life than what you weigh.
If you could change one part of your body, what would it be?
Name me a person who doesn’t want to change something at some stage. But it’s all about perspective. I’m healthy and that is what really matters – that statement is a cliché, but it is a cliché for a reason.
Would you consider plastic surgery?
I don’t know. I’m in my mid-thirties and I’d like to think I’d grow old gracefully. But who’s to say how I’ll feel in 10 or 20 years time? I believe in choice for everyone.
There are lots of beautiful women in the public eye, but I find vanity unattractive. Angelina Jolie is a beauty, but she doesn’t seem wrapped up in herself.
Her mind is on bigger things, like doing what she can for people in need. Also, Davina McCall doesn’t come across as narcissistic. She’s beautiful but is more interested in being a fun person to be around.
How do you pamper yourself?
Pampering is anything that doesn’t require me to use words or brainpower. If I can truly switch off, I consider it pampering.
How would you describe your style?
My wardrobe is multifunctional. I have clothes that work for different occasions– I’ll wear something smart for business meetings but most days I’m fairly casual.
Do you have a favourite shop or designer?
Selfridges. I love their collection and the fact it’s a one-stop shop. I love Peter Pilotto and, high-street wise, The Kooples, Jaeger and G-Star Raw for jeans.
What is the most you’ve ever spent on an item of clothing?
A Collette Dinnigan dress. But I love it more than my wedding dress!
Have you had any fashion disasters?
Yes! When I was in Coronation Street, I had such bleached blonde hair and bad fake tan, I looked a mess no matter what I put on. Also, I learned the hard way that just because you are given something free for a red carpet event, doesn’t mean it’s nice!
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