Sarah Paulson Threw an Epic 50th Birthday Party with Pedro Pascal, Cynthia Erivo and this "Real Housewives" Star!

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A few of the Emmy winner's 'American Horror Story' costars attended — along with one of her 'Ocean's 8' castmates!

Sarah Paulson knows how to ring in a new decade!

The Emmy winner turned 50 on Tuesday, Dec. 17, and to mark the milestone she hosted an incredible birthday party over the weekend with a few of her famous friends — including Pedro Pascal, Kyle Richards and many more!

Paulson's friends posted several photos and videos of the festivities to Instagram. Pascal, 49, added a sweet snap alongside his longtime friend in a photo booth beside Ozarkactor Jason Butler Harner. The trio are seen smiling together as flower petals fall on top of them. 

"Your flowers, Lady P," Pascal captioned the Instagram Story.

Related: Sarah Paulson Says Pedro Pascal Is 'Always Trying' to Make Her Watch Scary Movies — but She 'Just Can't' (Exclusive)

Butler Harner added a series of videos and photos to his Instagram Stories, including the same photo as Pascal. He captioned the photo: "Happiest of birthdays @mssarahcatharinepaulson. You deserve all the flowers! That party was Perfection. Nothing makes me laugh like when we're together @pascalispunk Love. Love. Love you."

Butler Harner also added a sweet photo of Paulson blowing out her birthday candles. The Monsters: The Lyle and Erik Menendez Storyactor also reposted Holland Taylor's video of Amanda Peet passionately dancing to Thelma Houston's "Don't Leave Me This Way" — with Pascal making a brief showstopping appearance in the background.

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In Taylor's footage, Peet, 52, danced animatedly to the disco song as other party-goers danced alongside her. Taylor, 81, also added twomore videos of other famous faces dancing, including Cynthia Erivorapping to Nelly's "Ride Wit Me" and dancing to Madonna's "Like a Prayer."

Taylor also posted a fun snap of her girlfriend before the festivities began, as they posed for an adorable mirror selfie. 

Related: Sarah Paulson and Amanda Peet Adopt 2 Puppies Together: 'New Addition to the Family'

Meanwhile, Paulson's longtime friend, Anthony Hemingway, added several videos of the celebration, including one of Taylor having a dance battle with Erivo, 37.

"It's the 17th all month! 🤣. HAPPY 50th my dear friend @mssarahcatharinepaulson of 29 incredible years! 💃🏻💃🏻💃🏻 ," he wrote in his Instagram caption. "Last night was a whole vibe—nothing but love, laughs, and the kind of joy you bring to everyone in the room. You're a Golden Milestone, walking sparkle, and a nonstop source of brilliance (and those ridiculous belly laughs). 💃🏾💃🏾💃🏾 Love you forever and then some. Here's to many, many more of your magic!"

Paulson's American Horror Story costar Leslie Grossman posted his own pics of the birthday girl enjoying the celebration, including Paulson swaying along when her guests sang "Happy Birthday" to her.

"The best night celebrating the best lady," Grossman captioned the video. She also added a photo of Paulson striking a pose with her "Happy 50th Birthday" crown. "The fact that I got her this headband at Party City and she made it look like haute couture tells you everything you need to know," she captioned the Instagram Story.

Neicy Nash-Betts was another famous face who joined the festivities, as seen in an Instagram video she posted of Paulson at the celebration.

"Screaming Happy 50th🎉🍾🎂@mssarahcatharinepaulson So happy you FINALLY had a party! EVERYONE came out to love on you! The Betts wouldn't miss it for the world ❤️ We love you 😘," wrote Nash-Betts.

Her video featured moments with Paulson's Ocean's 8costar, Sandra Bullock, and Nash and wife Jessica snapping flicks in the photo booth.

Like Nash-Betts, Real Housewives of Beverly Hills star Kyle Richards also posted a couple of photo booth pictures of her and Paulson in her Instagram Stories. "May all your wishes come true 🩷🎂🙏😘," Richards captioned her Instagram Stories.

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Other celebrities that appeared at the blowout celebration include Melanie Lynskey, Regina King and Elizabeth Banks, per photos obtained by fan pages.