Dianna Agron looks fancy in a floral frock as she goes arm-in-arm with boyfriend Winston Marshall after Marc Jacobs show

It was the closing event of New York Fashion Week.

So style-savvy actress Dianna Agron was naturally putting in an appearance at the Marc Jacobs show, and was joined by her boyfriend Winston Marshall as she left the Ziegfeld Theater on Thursday night.

The 29-year-old star looked lovely as ever in a floral dress with a sweetheart neckline as she cosied up to the Mumford and Sons banjoist at the Spring/Summer 2016 presentation.

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Flower power: Dianna Agron and Mumford and Sons banjoist Winston Marshall looked loved-up as they left the Marc Jacobs show at the Ziegfeld Theater on Thursday night

Flower power: Dianna Agron and Mumford and Sons banjoist Winston Marshall looked loved-up as they left the Marc Jacobs show at the Ziegfeld Theater on Thursday night

Dianna gave a nod to the 50s in her retro, off-the-shoulder dress featuring a voluminous, tiered skirt.

The Glee actress paired her floral red gown with a pair of strappy black flats and a cute clutch bag.

She styled her blonde bob in loose, old school Hollywood waves with a sweeping side fringe and opted for a natural make-up look.

Old Hollywood glamour: Dianna donned a red, flower-embellished dress with a voluminous tiered skirt 

Old Hollywood glamour: Dianna donned a red, flower-embellished dress with a voluminous tiered skirt 

Pretty as a picture: The former Glee actress styled her blonde bob in soft waves with a sweeping side fringe 

Pretty as a picture: The former Glee actress styled her blonde bob in soft waves with a sweeping side fringe 

Tell a style story with a book clutch by Olympia Le-Tan

Dianna Agron is redefining the book club concept.

She is the latest in a long line of celebrities (Kim and Kourtney Kardashian, Miranda Kerr, Chloe Moretz and Natalie Portman are all in the A-list fan club too) that we have spotted carrying a covetable little clutch bag by Olympia Le-Tan.

We love the idea of making books into bags and there's a whole library of covers to choose from. So pick your favorite page-turner and wear it with a little black dress on your next night out to let your accessories do all the talking!

Dianna has chosen 'The Red Shoes', although ironically her lace up pumps are black... Nevertheless it's the perfect thing to team with her off the shoulder scarlet floral dress and the novelty of this bag will never wear off for us.

Click the link (right) to get your hands on her exact style, or go geek chic for less with the help of our edit below.

* PRICES MAY NOT BE AS ADVERTISED

Dianna's rocker boyfriend, who she has been dating for a few months, was dressed casaully in a navy button-down jacket and skinny jeans.

The couple were first spotted out together in Paris in July as they strolled once again with their arms draped around one another.

Prior to their pairing, Winston was linked to Katy Perry, and the two were reportedly seen together after a gig in Berlin in March.

Simple touches: Dianna accessorised with black strappy flats and a quirky clutch bag
Simple touches: Dianna accessorised with black strappy flats and a quirky clutch bag

Simple touches: Dianna accessorised with black strappy flats and a quirky clutch bag 

Party pals: Dianna chatted to (L-R) Mackenzie Davis, Kate Mara and Imogen Poots, who all wowed in black 

Party pals: Dianna chatted to (L-R) Mackenzie Davis, Kate Mara and Imogen Poots, who all wowed in black 

Dianna was alleged to be dating Nicholas Hoult, after the pair were spotted at a London club together in April.

In June, Dianna wrapped up her stint in McQueen, a London play based on the life of tragic fashion designer Alexander McQueen, who committed suicide in 2010.

After the initial run concluded at St. James Theatre it was announced that Dianna would not return to the play when it relocates to the West End's Theatre Royal at the end of the month.

The actress, who plays McQueen fan Dahlia in the play, revealed that prior work engagements stopped her returning to the role, for which she received mixed reviews.

New love: Dianna and Winston were first spotted together during a romantic trip to Paris in July and have been inseparable ever since 

New love: Dianna and Winston were first spotted together during a romantic trip to Paris in July and have been inseparable ever since 

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