Inside the Hottest Parties of the 2015 Oscars

The 87th annual Academy Awards wrapped up late Sunday night, and all of Tinseltown marked the occasion with a series of glitzy celebrations. It was a special night—even by Hollywood standards. "There were so many great moments tonight, but honestly it's just always wonderful to see people who I've worked with before---Mark Ruffalo, Naomi Watts, Michael Keaton," best actress nominee Reese Witherspoon tells InStyle.

PHOTOS: See What Everyone Wore on the 2015 Oscars Red Carpet

The night's big winners included Patricia Arquette and JK Simmons, who took home the best supporting actress and actor trophies, as well as best actress Julianne Moore and Eddie Redmayne—who earned the best actor Academy Award after being nominated for the first time. And just where is the 33-year-old keeping the gilded statuette? "We have a very small apartment, so we’re not quite sure yet," Redmayne tells InStyle.

Many celebrities who couldn't make it to the live show watched it at the 23rd annual Elton John AIDS Foundation Academy Awards Viewing Party. And after the broadcast, Oscar attendees and other stars headed to the after-parties (where the fun really happens). Stars like Jared Leto, Redmayne, and Lupita Nyong'o fêted the occasion at the 2015 Vanity Fair Oscar Party (above) and at the Governors Ball, the newly minted Academy Award winners got their trophies engraved with their names. Redmayne got a kiss from wife Hannah Bagshawe as he got his name etched into his new Oscar. When Moore got her statuette back, she said, "It's perfect!" and smooched husband Bart Freundlich. To see how they and more stars spent the festive night, take a look at our gallery.

PHOTOS: Inside the 2015 Oscar Parties

—With reporting by Sharon Clott Kanter

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Emma Stone and Julianne Moore

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Best supporting actress nominee Emma Stone and best actress winner Julianne Moore give each other (and their gold and Lego Oscar statuettes) a hug at the 2015 Governors Ball.

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Eddie Redmayne and Hannah Bagshawe

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Eddie Redmayne's Oscar statue gets a shine at the 2015 Governors Ball as he and wife Hannah Bagshawe look on.

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David Burtka and Neil Patrick Harris

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The pair relax at the Governors Ball after Harris successfully brought the 87th annual Academy Awards to a close. 

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Julianne Moore

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Moore has her best actress Oscar engraved with her name at the 2015 Governors Ball.

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Jared Leto, Eddie Redmayne, and Lupita Nyong'o

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Leto and Nyong'o celebrate Redmayne's best actor Oscar win at the Vanity Fair Oscar Party.

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Sir Elton John

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Sir Elton John performs at his foundation's 23rd annual Oscar viewing party.

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Naomi Watts, Justin Theroux, and Jennifer Aniston

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Watts, Theroux, and Aniston fête the occasion at the Vanity Fair Oscar Party.

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Solange Knowles and Beyoncé

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The sisters—a vision in winter white—pair up at the 2015 Vanity Fair Oscar Party.

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Chace Crawford, Kelly Rutherford, and Jessica Szohr

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Elton John's Oscar party hosts a mini Gossip Girl reunion with Crawford, Rutherford, and Szohr.

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Felicity Jones

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"I’m just starving hungry. I have to go grab something to eat!" best actress nominee Jones tells InStyle at the 2015 Governors Ball.

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Emma Stone and Krista Jean Stone

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The Birdman actress spent some quality time with her mom at the Vanity Fair Oscar Party.

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Heidi Klum and Sia

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Heidi Klum and Sia, who gave us a clear view of her face by sweeping her hair into an updo, meet up at the Elton John AIDS Foundation Academy Awards Viewing Party.

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Aaron Paul, Lauren Parsekian, Sarah Hyland, and Dominic Sherwood

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The two couples post together at Elton John's Oscar party.

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Joshua Jackson and Diane Kruger

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Jackson and Kruger share an intimate moment at the 2015 Vanity Fair Oscar Party.

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Jon Voight and Jessica Chastain

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Voight greets Chastain on the Vanity Fair Oscar Party red carpet.

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Laura Dern

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Best supporting actress nominee Laura Dern and a guest show off their baubles at Vanity Fair's Oscar party.

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Dita Von Teese, Miley Cyrus, and Lil' Kim

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Von Teese (in Zuhair Murad), Cyrus (in Schiaparelli Couture), and Lil' Kim visit with each other at the Elton John AIDS Foundation Oscar party.

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Margot Robbie

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The Suicide Squad actress smolders in a bold red lip and black gown at the Governors Ball.

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Marion Cotillard

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One of the best moments of the night for the best actress nominee? "Birdman and Julianne Moore winning after five nominations. She’s one of the best actresses in the world, so that was a highlight," Cotillard tells InStyle at the 2015 Governors Ball. "She’s just genius, honestly."

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Sharon Osbourne and Miley Cyrus

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Sharon Osbourne and Miley Cyrus pucker up for the camera at Elton John's Oscar party.

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