Golden Globes 2017 After-Parties: Stars Mingle With Their A-List Squads at Swanky Soirees

ET's insiders were out all night with Hollywood A-listers and got a firsthand look at how the stars cut loose.

After the awards show is when the night gets really turnt up!

ET's insiders hit up all the after-parties following the 74th Annual Golden Globe Awards, and got a firsthand look at how the stars cut loose.

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Here's what went down when the awards show wrapped and the real partying began!

HBO's Golden Globe Awards After Party: Friendship Goals and Tom Hiddleston Talk

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Sarah Jessica Parker, Nicole Kidman and Reese Witherspoon didn't stop to change but instead arrived to the party together, and posed fun photos outside the venue. Kidman and husband Keith Urban were also spotted chatting with Witherspoon and Parker before leaving Circa 55 restaurant hand-in-hand.

There was some talk at the party of Tom Hiddleston's Golden Globe win for his role in The Night Manager. One guest was overheard saying, “This is his total revenge on Taylor [Swift]. Wonder what’s going through her mind now.”

Westworld star Evan Rachel Wood was spotted holding hands with a mystery man at the event. The two avoided cameras but did become quite cozy with one another throughout the night.

La La Land director Damien Chazelle carried his award into the party, and even let a female party goer pose with his statue.

Just when the party seemed to be wearing down, in walked Vince Vaughn and wife Kyla Weber. Hillary Duff and Happy Endings star Adam Pally also showed up.

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NBC Universal's Golden Globes After Party: This Is Us Cast Gets the Party Started!

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Milo Ventimiglia, Mandy Moore, Chris Sullivan, Susan Kelechi Watson, Chrissy Metz, Sterling K. Brown and Justin Hartley posed for pics at The Beverly Hilton Hotel before sharing some laughs and hugs. Brown was later spotted dancing to Robin Thicke's "Blurred Lines," while Metz made conversation with her publicist. Meanwhile, Hartley told ET that he was excited to share this night with his fiancee, Chrishell Stause.

Golden Globes host Jimmy Fallon made quite the entrance. The TV personality was immediately surrounded by people wanting a photo, and wherever he seemed to go that night, a crowd followed. Fallon posed for pics with Stevie Wonder, Lorne Michaels and Carl Weathers, and joked that he was "ready to party with ET and we pretend to leave together."

Marlon Waynes came into the party dancing and continued to bust a move as he ate pizza and spicy shrimp.

Kendall and Kylie Jenner were also excited about the pizza, and were seen carrying multiple slices. Botched star Dr. Paul Nassif greeted the sisters with a kiss on the cheek, but their bodyguards never left their side, and the cameras didn't stop snapping.

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Jimmy Fallon After Party: All the Stars Are Out!

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After making the rounds at other soirees, Fallon had his own party at Hollywood hot spot, Delilah, and a slew of stars ended up there. Andrew Garfield hit the dance floor with The Crown's Claire Foy, but they weren't alone. Donald Glover and the cast of Atlanta were also spotted dancing to Migos' song, "Bad and Boujee." Fallon profusely thanked the DJ at the event, which included complimentary flip-flops for guests.

Other A-listers at the party included Chris Hemsworth and wife Elsa Pataky, Jon Hamm, Sarah Paulson, Pierce Brosnan, Jonah Hill, Kate Hudson, Sienna Miller, Zach Braff, Mark Ronson, Christian Slater, Naomi Campbell, Leonardo DiCaprio, Tobey Maguire, Kerry Washington and husband Nnamdi Asomugha.

Warner Bros. Pictures and InStyle Post-Golden Globes Party: Priyanka Chopra and Sofia Vergara Are Golden Girls

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Priyanka Chopra and Sofia Vergara looked like besties in their matching gold gowns. The Quantico star was chatting with a few women before the Modern Family actress made a beeline for her to exchange compliments and hugs.

Viola Davis was spotted toasting her win for best supporting actress with a glass of Perrier-Jouët in one hand and her award in the other. Nearby, Felicity Huffman and Connie Britton were perched on a sofa gabbing over glasses of bubbly.

Ryan Reynolds and Blake Lively were nearly inseparable at the party, and stopped to talk a bit with Jake Gyllenhaal. The adorable couple left arm-in-arm.

Another cute pair at the party was Joe Jonas and girlfriend Sophia Turner. The Game of Thrones star and DNCE singer hit the dance floor when Robyn's "Dancing on My Own" was playing. Derek Hough and Jenna Dewan Tatum were also at the soiree, and while they're both dancers, the two stuck to just chatting at the bar.

Hough eventually joined his sister, Julianne Hough, on the dance floor.

Other guests inside the event included Vanessa Hudgens, Emily Ratajkowski, Heidi Klum, Jesse Tyler Ferguson, Justin Mikita, Chrissy Teigen, John Legend, Niecy Nash and Kylie Bunbury.

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WME Golden Globes After Party: Affleck Brothers Have Guys' Night Out

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After Casey Affleck's Golden Globes win, his older brother Ben was looking for him at the after party held at Chateau Marmont. The famous siblings were joined by DiCaprio and Maguire.

Derek Hough also showed up at this soiree, and got Billions star Malin Ackerman "dirty dancing," as one onlooker put it. His sister, Julianne, soon joined in on the dance party.

Golden Globes winner Emma Stone didn't show up until 1 a.m., and by 1:30 a.m., Sophia Richie is singing "Happy Birthday" to Nicola Peltz.

Amber Heard was also spotted outside the party, holding hands with an unidentified woman.

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FOX and FX's 2017 Golden Globe Awards After-Party: Sterling K. Brown Hits the Dance Floor

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In addition to NBC's after-party, Brown joined his This Is Us siblings at the FX party. The Golden Globe nominee hit the dance floor with Hartley, while his The People v. O. J. Simpson: American Crime Story co-star, John Travolta, and wife Kelly Preston chatted with a group of people nearby.

Cuba Gooding Jr. was also at the party, and was spotted dancing to Mariah Carey's "Heartbreaker" before he hit up the Netflix event.

In addition to the American Crime Story stars, Natalie Portman, Pharrell Williams and Mahershala Ali were in attendance.

PHOTOS: Kylie and Kendall Jenner Rock Thigh-High Slits to Golden Globes After-Party, Chow Down on Pizza

The Weinstein Company and Netflix Golden Globe Party: Stranger Things Stars Bust a Move

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The beloved young actors of Stranger Things debuted their moves at this party, sponsored by Fiji water and Landmark wines. When they weren't posing for photos, the Netflix cast was dancing up a storm.

John Lithgow, Dev Patel, Keegan Michael Key, Lisa Rinna, Harry Hamlin and Iggy Pop were also at the party.

Prior to the parties, ET was on hand at the Golden Globes to witness the moments that weren't caught on camera. Check them out:

Reporting by: Brendon Geoffrion, Leanne Aguilera, Angelique Jackson, Marisa Fassino, Joseph Corral and Steven Wilks.