But unless she spends her life wearing gloves, there is no hiding her sinewy hands.
While taking a break from filming her latest movie, Did You Hear About The Morgans UGG Classic Short Boots?, in New York, her visible veins betrayed her 44 years Ugg Bailey Button Boots.
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Prominent veins can be a sign of physical over-exertion, according to fitness experts.
Sarah has previously claimed she is more inclined to ‘go to a dinner party than slave away in the gym’.
But the former dancer has been known for practising a daily exercise regime of running, climbing stairs, yoga and Pilates.
But aside from her hands, the actress worked a typically chic look.
She wore a figure-hugging blue dress and peep-toe heels, and had her hair styled in a fringe and soft waves.
Later, she swapped the elegant look for more casual attire, wearing jeans, Ugg boots and a black jacket.
Did You Hear About The Morgans? is about an estranged couple who witness a murder and are relocated to small-town Wyoming as part of a witness-protection programme.
Sarah stars opposite Hugh Grant in the film, and revealed her thoughts on her co-star in a recent interview.
‘I think Englishmen live up to all the ideals and Hugh is a perfect example.
‘He’s a definition for all of us less well-travelled Americans of the classic literary and cinematic Englishman – witty and brainy. There’s nothing smarter and sexier and more interesting than a brain, and I’m very excited about working with him.’