Taking the plunge! Drew Barrymore shows off extreme décolletage in low-cut navy dress at NY premiere of Miss You Already

She's one of Hollywood's most down-to-earth stars.

But actress Drew Barrymore looked glamorous in a pretty floral dress as she attended the New York premiere of her new film with Toni Collette, Miss You Already, on Sunday.

The actress, 40, showed off her decolletage in the plunging dress, which featured a pretty embossed flower pattern on a dark navy blue fabric.

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Glamorous: Actress Drew Barrymore showed off her cleavage in a plunging navy dress at the New York premiere of her new film Miss You Already in New York on Sunday

Glamorous: Actress Drew Barrymore showed off her cleavage in a plunging navy dress at the New York premiere of her new film Miss You Already in New York on Sunday

The breast of all! The stunner showed off a serious amount of cleavage as she turned heads on the night 

The breast of all! The stunner showed off a serious amount of cleavage as she turned heads on the night 

The former E.T. star has always loved flowers - even going by the nickname Daisy, naming her cosmetics and film production companies both Flower, and titling her new memoir Wildflower.

Drew's new book of autobiographical essays, which includes her reflections on growing up in Hollywood through to becoming a wife and mother, will be released on October 27.

The actress told People that becoming a mother to daughters Frankie and Olive had inspired her to look back on her life with a new perspective.

Flower power: The 40-year-old's dress featured a pretty flower design

Flower power: The 40-year-old's dress featured a pretty flower design

Look blooming marvelous in Drew's Stella McCartney dress

Always ahead of the game, Drew Barrymore opted for a hot-off-the-runway gown for the New York premier of her new film Miss You Already.

The dress is taken from Stella McCartney's SS16 collection (click right to buy it now from NeimanMarcus.com), where the British designer utilized a botanical motif throughout. Florals in spring may seem a little obvious, but add a darker palette and you have the recipe for all-year-round style!

A plunging neck line and a-line silhouette are ideal for women with curves, however, this structured cotton and silk mix dress features a fitted waist, making it flattering on all physiques. Add strappy sandals and a mini clutch, like Drew, and you'll be ready for your night out on the town.

If Stella McCartney is outta your budg, then don't worry, we've got you covered in our edit below with affordable alternatives.

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Chic: She carried a red quilted Chanel bag on her shoulder as she cosied up to her handsome man

Chic: She carried a red quilted Chanel bag on her shoulder as she cosied up to her handsome man

Sharing the moment: The couple remain very much in love as Will celebrated Drew's success with her

Sharing the moment: The couple remain very much in love as Will celebrated Drew's success with her

'It was a lot to take on, but my daughters and my life so far have inspired me to look back and remember moments in my life and write about them,' she told People.

On Sunday, Drew wore her ombre blonde hair in tousled waves, and added grey pointed heels as she arrived at the premiere at the Montblanc & The Cinema Society-hosted premiere.

Supporting Drew at the premiere was her art consultant husband Will Kopelman, who looked handsome in a sharp black suit and yellow tie.

Miss You Already follows two female friends through the ups and downs as Barrymore's character becomes pregnant just as her best friend, played by Toni Collette, is diagnosed with cancer.

Sparkle: The actress and cosmetics company owner wore bright lipstick and shimmery eyeliner

Sparkle: The actress and cosmetics company owner wore bright lipstick and shimmery eyeliner

The actress, who also runs her own business empire with Flower cosmetics and eyewear, played up her lips with a coral pink lipstick, and added shimmery silver eyeliner.

Barrymore, who wed husband Will Kopelman in 2012, is mother of two daughters, one-year-old Frankie and three-year-old Olive.

Also attending the premiere was Barrymore's costar Toni Collette, who wore a shimmery gown.

Back together: Australian actress Toni Collette stars as Drew's best friend in the drama

Back together: Australian actress Toni Collette stars as Drew's best friend in the drama

Hit it off: The actresses play two lifelong friends who are tested by cancer and pregnancy

Hit it off: The actresses play two lifelong friends who are tested by cancer and pregnancy

What are they talking about? The girls could barely stop laughing as they caught up with one another 

What are they talking about? The girls could barely stop laughing as they caught up with one another 

She's got something to say: Toni appeared to be quite the story-telling as she got Drew's attention

She's got something to say: Toni appeared to be quite the story-telling as she got Drew's attention

Perfect friendship: The girls walked hand in hand for much of the evening, proving just how well they get along

Perfect friendship: The girls walked hand in hand for much of the evening, proving just how well they get along

The Australian star, 42, looked great in the floor-length sequined gown embellished with a pretty purple and green vertical pattern.

Toni wore her blonde hair in a short, edgy style, and added a dark red clutch and dark manicure.

And the actresses appeared delighted to be reunited, sharing a laugh and catching up as they attended the New York screening.

Gorgeous: Toni wore a stylish sequined gown with modern purple and green pattern
Modern look: The Australian star wore her blonde hair in an edgy pixie cut

Gorgeous: Toni wore a stylish sequined gown with modern purple and green pattern

Pretty as a petal: She looked fabulously flawless as she posed against a backdrop of pretty flowers 

Pretty as a petal: She looked fabulously flawless as she posed against a backdrop of pretty flowers 

Also attending the screening was actor Cuba Gooding, Jr.

The Oscar-winner, 47, has been hard at work filming American Crime Story, in which he stars as OJ Simpson in the upcoming TV series about the 'crime of the century.'

Cuba looked relaxed in a suede jacket, grey scarf and jeans on Sunday.

Also at the film screening was former R.E.M. singer Michael Stipe, 55, who wore a bushy beard and checked blue scarf.

All smiles: Actor Cuba Gooding Jr, who plays OJ Simpson in upcoming TV series American Crime Story, looked relaxed in jeans and a navy shirt

All smiles: Actor Cuba Gooding Jr, who plays OJ Simpson in upcoming TV series American Crime Story, looked relaxed in jeans and a navy shirt

Serious: Former R.E.M. singer Michael Stipe also attended the screening

Serious: Former R.E.M. singer Michael Stipe also attended the screening

Trudie Styler also attended the screening in New York.

The British actress and producer, who is married to singer Sting, wore a bright orange fitted dress.

The 61-year-old accessorized with a silver bangle and black leather clutch.

Bright spark: British actress-producer Trudie Styler stood out in a fitted orange dress

Bright spark: British actress-producer Trudie Styler stood out in a fitted orange dress

Screen legend: Actress Jacqueline Bisset looked elegant in a black gown with sheer sleeves

Screen legend: Actress Jacqueline Bisset looked elegant in a black gown with sheer sleeves

So much elegance: The actress looked fierce in her ballgown as she posed for a quick snap

So much elegance: The actress looked fierce in her ballgown as she posed for a quick snap

A giggle a minute: Toni jad Jacqueline in stitches as well as the pair caught up over a drink

A giggle a minute: Toni jad Jacqueline in stitches as well as the pair caught up over a drink

English actress also stars in the film, and 71-year-old star wore a classic black gown to the New York premiere.

The Dancing on The Edge actress' glamorous dress featured a V-neckline and sheer sleeves.

She accessorized with black heels, bracelet and clutch as well as sparkly drop earrings. 

City style: The View host Michelle Collins wore a flowing black dress and stylish overcoat

City style: The View host Michelle Collins wore a flowing black dress and stylish overcoat

The View co-host Michelle Collins also went for an all-black ensemble on Sunday.

The comedian, 34 wore a flowing black dress and dark overcoat, and added a pop of color with a bright pink bag. 

Actress Lori Petty, 52, wore a bold red plaid coat with distressed hem, over black and white patterned pants as she joined the others at the screening.

Bold look: Orange Is The New Black actress Lori Petty went with a distinctive red plaid coat and matching hat
You go, girl! Lori was channelling some pretty sassy moves as she strutted her stuff

Bold look: Orange Is The New Black actress Lori Petty went with a distinctive red plaid coat and matching hat

The Orange Is The New Black actress wore a bright red hat, dark sunglasses and carried a white tote bag.

The film's director Catherine Hardwicke also went with an all-black look for the premiere.

Catherine, who also directed Twilight and co-wrote Thirteen with a then-fourteen-year-old Nikki Reed, wore a cropped black top and knee-high riding boots, paired with a chunky necklace.

Behind the camera: The film's director Catherine Hardwicke wore a cropped top and black riding boots

Behind the camera: The film's director Catherine Hardwicke wore a cropped top and black riding boots

Girl talk: Drew and Catherine also posed for a snap together as the actress worked the room 

Girl talk: Drew and Catherine also posed for a snap together as the actress worked the room 

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