Rosie Huntington-Whiteley reveals her pert posterior in a pencil skirt as she cuts a sexy yet sophisticated silhouette at charity event

She's already one of the most successful fashion faces behind Marks & Spencer.

Which is why Rosie Huntington-Whiteley was keeping up appearances in a sharp and sophisticated ensemble as she launched an underwear collection with the high street brand for a good cause.

Lingerie model Rosie, 28, was there to see her new range, modelled by survivors in association with Breast Cancer Now, drop in stores on Tuesday morning.

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Fashion face: Rosie Huntington-Whiteley meant business in a sophisticated get up as she launched her new lingerie collection for M&S with Breast Cancer Now on Tuesday

Fashion face: Rosie Huntington-Whiteley meant business in a sophisticated get up as she launched her new lingerie collection for M&S with Breast Cancer Now on Tuesday

Her credentials as an aspirational shape for lingerie were on show as she slipped into a fitted black pencil skirt that hugged to her pert bottom.

Rosie meant business in dainty ankle strap heels and a sleeveless roll neck, on which she proudly wore her support for the campaign in the form of a tiny button badge.

Golden girl Rosie styled her hair in light waves at shoulder length and emphasised her full pout with a deep rose colour.

All smiles: The blonde looked ultra-glam as she fronted the campaign
Pert: Her credentials as an aspirational shape for lingerie were on show as she slipped into a fitted black pencil skirt

Sophisticated: She cut a glamorous silhouette in a black pencil skirt and a sleeveless roll neck

Keep your sandals sleek and sophisticated like Rosie

Rosie Huntington-Whiteley is the star of the show when it comes to Marks and Spencer events, not to mention their charity projects, their advertisements and their underwear modelling...she really is giving it her all for the once mumsy brand turned coolly chic...and we think it's got a lot to do with her.

And as she stepped out here for a breast cancer campaign, the blonde beauty stunned in a sleek yet simple look, teaming a black pencil skirt with a beige sleeveless sweater and unfussy, black, strap sandals. While on many this look could come across as a little worky, on Rosie it looks pure elegance personified.

The sandals are by Gianvito Rossi, an Italian master when it comes to footwear and anyone who is anyone has a pair of barely there sandals by this luxe designer. If you're keen to get involved, click right to buy Rosie's exact pair now from Barney's.

If you're looking to get a similar pair for less, search no further than our four fabulous options below.

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The blonde was fronting a fun campaign aimed at celebrating women while also raising awareness of the disease to support for Breast Cancer Awareness Month. 

Hers is already the best-selling underwear range in the retailer's history and her newest venture is therefore expected to be a popular one.

The 19-piece range includes a post-­surgery bra, which combines the luxurious details seen in her previous ranges, with specially developed features for women who have undergone surgery. 

Good cause: Rosie's lingerie collection is a best-seller for the brand and this one has a good cause

Good cause: Rosie's lingerie collection is a best-seller for the brand and this one has a good cause

Showing her support: 10 per cent of the proceeds will be donated to charity 

Showing her support: 10 per cent of the proceeds will be donated to charity 

It's evidently a cause close to Rosie's heart, since she was seen tearing up as she directed the seven brave models on the photoshoot that will accompany the new releases.

Speaking about her latest collection, which will see 10 per cent of all sales donated to charity, Rosie added: 'It has been amazing to co-design and develop this range, and meet exceptional and inspirational women featured in our campaign.' 

Rosie launched her first Autograph collection, which she co-designs with head of lingerie Soozie Jenkinson, back in 2012 and is now a regular face for the retailer's every day designs. 

And it's not the only way that Rosie has been showing her support because the blonde has also been encouraging social media users to #ShowYourStrap and help raise funds with M&S.

Proud: Model Rosie worked it with hands on hips
Cheeky: From behind, Rosie was showing off her shape

Meaningful: It's evidently a cause close to Rosie's heart, since she was seen tearing up as she directed the seven brave models on the photoshoot that will accompany the new releases

Lending her star power: It's not the only way that Rosie has been showing her support because the blonde has also been encouraging social media users to #ShowYourStrap and help raise funds with M&S

Lending her star power: It's not the only way that Rosie has been showing her support because the blonde has also been encouraging social media users to #ShowYourStrap and help raise funds with M&S

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