Patricia Arquette won the Oscar for Best Supporting Actress at the 2015 Academy Awards for her role in Boyhood , a victory that was 12 years in the making.
Arquette was filmed over a period of 12 years, from the ages of 33 to 45, for Boyhood , in which she plays the mother of Mason. The film follows Mason from the age of 5, documenting the trials of growing up. The film was directed by Richard Linklater.
The Oscar is the fourth major award Arquette has won for her performance in Boyhood , as she also claimed the Golden Globe, Screen Actors Guild award and the Bafta.
Emma Stone in Elie Saab.
Lime green is an usual colour on the red carpet but if anyone can make it work it's Emma Stone. The dress is very pretty but with previous looks including a jumpsuit we were expecting something a little more fashion forward.
Scarlett Johansson in Versace.
A figure hugging emerald green gown by Versace for Scarlett Johansson. The oversized necklace takes away abit from the dress but perhaps she's trying to distract from the new shaved hairdo she's sporting.
Julianne Moore in Chanel couture.
Julianne Moore has consistently dominated best dressed lists this award's season. This custom made design by Chanel will help her retain the title, we've seen alot of white dresses on the red carpet but this sequin dress is a superior example, managing to be both simple in structure but detailed in construction.
Reese Witherspoon in Tom Ford.
A sleek white gown for Reese with contrasting black off-the-shoulder and waist bands to accentuate her hourglass figure.
Jennifer Aniston in Versace.
A nude beaded dress by Versace for Jennifer Aniston, up close the beading is sheer in parts - an unusually risque design for the actress who we normally see playing it safe on the red carpet.
Jessica Chastain in Givenchy by Riccardo Tisci.
A stylish navy for Jessica Chastain complete with thigh slit and sequinned bodice for added detailing.
Lady Gaga in Alaia.
This dress is very special indeed - the first custom made design for the Oscars to come from Azzedine Alaia. Although rather spectacular it's actually very tame by Gaga standards - even with those red gloves.
Keira Knightley in Valentino.
Keira is very much the glowing expectant mother in this ethereal gown complete with flower embroidery by Valentino.
Gwyneth Paltrow in Ralph and Russo.
Gwyneth has gone back to her Oscar roots with a pale pink gown reminiscent of the Ralph Lauren one she wore back in the 90s. A pretty colour but there is something very 80s about the big flower on her shoulder.
Jennifer Lopez in Elie Saab couture.
This is one seriously mega dress, but we expect nothing less from Jennifer Lopez.
Meryl Streep in Lanvin.
There's not many people that could get away with turning up to the Oscars in a skirt, blazer and blouse but Meryl Streep luckily is one of them.
Kerry Washington in Miu Miu.
A figure fitting nude dress by Miu Miu for Kerry Washington, the champagne colour makes a nice change from all the white dresses we've been seeing and on closer inspection the skirt is actually entirely beaded.
Marion Cotillard in Dior couture.
As expected Marion Cotillard opted for a couture design by Dior.
Nicole Kidman in Louis Vuitton.
Nicole Kidman opted for a sleek sequinned gown by Louis Vuitton - the iridescent sequins are not photographing well here. The addition of a red belt to the look will divide opinion but it brings a welcome addition of colour that nicely breaks up the dress.
Naomi Watts in Armani Prive
One of the more unusual dresses of the evening, Naomi Watts opted for a silver and black patterned halterneck gown with black band detailing. The cutaway back with cropped top gives it a modern touch.
Dakota Johnson in Saint Laurent.
A bold red dress for the star of Fifty Shades of Grey who is presenting an award at tonight's ceremony. The embellished one shoulder detail adds a hint of sparkle to the look.
Zoe Saldana in Versace
A flattering dress with draping at the centre to the make the most of Zoe's curve. However the colour lets it down - beige is never a good colour on the red carpet.
Rita Ora in Marchesa.
A dramatic red carpet look for Rita Ora - which helps make an otherwise quite boring colour - something special.
Cate Blanchett in Maison Margiela.
Only Cate Blanchett could get away with wearing what is a very simple black shift shape gown with the addition of a bright blue necklace to add a pop colour.
Behati Prinsloo in Armani Prive
Victoria's Secret model Behati Prinsloo is flawless in an exquisite beaded red and black gown by Armani Prive.
Rosamund Pike in Givenchy by Riccardo Tisci.
Red dresses are trend on this evenings red carpet. This is one of the best, and it fits Rosamund like a glove; with lace, a thigh split and a nipped in waist detail to make the most of Rosamund's shape.
Solange Knowles breaks the mould in this hybrid red culotte/dress design. Whilst it is certainly innovative it would have been nice to see it with a little less fabric.
Chrissy Teigan in Zuhair Murad
There's too much going on here - the lace embroidered top, the multiple thigh splits, the chiffon on the back and the very dark choice of lipstick.
Lupita Nyong'o in Calvin Klein.
Lupita was the undisputed winner of the 2014 awards season, she's presenting an award tonight and hasn't dropped the ball in the wardrobe department in this custom made stunning white beaded gown.
Chloe Grace Moretz in Miu Miu.
The young actress opted for a strapless floral print gown by Miu Miu. This won't be to everyone's taste but black tie gowns can be aging so it's refreshing to see a younger star do something different.
Sienna Miller in Oscar de la Renta.
Sienna Miller is usually a pioneer in the style stakes however this simple dress by Oscar de la Renta is just a little drab.
Felicity Jones in Alexander McQueen.
The British actress in a silver beaded gown custom made by Alexander McQueen. Whilst the custom made design is rather amazing, as with other rather voluminous dresses worn during awards season by Felicity Jones, it seems to overwhelm her.
Margot Robbie in Saint Laurent
This black chiffon gown by Saint Laurent has a 70s feel to it. The black chiffon gown has alot of fabric to it and the long sleeves and billowing fabric could be overwhelming but Margot Robbie pulls it off with ease.
Laura Dern in Alberta Ferretti
Nominee Laura Dern opted for this silver strapless gown by Alberta Ferretti, unfortunately the metallic makes her look ready for battle - it's a little too warrior princess for a red carpet.
Anna Kendrick in Thakoon
Coral is not a common colour on the red carpet, but Anna effortlessly pulls off this pretty halterneck gown. The only issue with the dress is the cut-out which was a detail too far.
Jennifer Hudson.
A very welcome flash of colour provided by this sleek yellow dress.
Patricia Arquette in Rosetta Getty
Nominee Patricia opted for the eternally stylish colour combination of black and white. The look is flattering whilst the off-the-shoulder sweep of fabric adds a more modern touch to the otherwise classic look.
Karolina Kurkova in Marchesa
A minimalist look for supermodel Karolina Kurkova, proving sometimes less is more.
Faith Hill in J.Mendel
Singer Faith Hill opted for a white beaded gown by J.Mendel. The pretty beading and low neckline stops this white dress straying into bridal territory.
America Ferrera in Jenny Packham
A pretty Grecian design for the star of Ugly Betty. The chiffon layers gives a nice softness to this look.
Kelly Osbourne
A classy red carpet appearance for the usually more eccentric Kelly O, the voluminous skirt and lace sleeves make for a very flattering dress.
Giuliana Rancic in Mireille Dagher
On first glance a nice look on the E! presenter, however on closer observation the front of the dress includes fishnet - something that should never be seen on a red carpet gown.
Anna Faris in Zuhair Murad.
A very pretty, strapless embellished ball gown gown by Zuhair Murad for Anna Faris.
Speaking backstage after her acceptance speech, in which she made an impassioned plea for equal rights in the US, Arquette said: “We talk about equal rights for women in other countries... we don’t have equal rights for women in America because when they wrote the constitution, they didn’t write it for women.”
Arquette beat out Laura Dern (Wild ), Keira Knightley (The Imitation Game ), Emma Stone (Birdman ) and Meryl Streep (Into the Woods ) to claim the Oscar.
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