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Seth MacFarlane Throws Star-Studded Holiday Bash With Guests Like Charlize Theron, Zac Efron, Robert Pattinson: Details!

Seth MacFarlane and Charlize Theron
Seth MacFarlane threw a holiday party and pal Charlize Theron attended and conducted the live orchestra on Dec. 13.

Peter, Lois, and Stewie couldn't make it, but Seth MacFarlane still had a pretty impressive turnout for his holiday party on Saturday, Dec. 13. The festive soiree took place at his private residence in Beverly Hills and played host to A-listers like Charlize Theron, Leonardo DiCaprio, Robert Pattinson, Sean Penn, F.K.A. twigs, Zac Efron, Kate Beckinsale, Martin Scorsese, Ashley Greene, Ryan Seacrest, Matt Bomer, Darren Criss, Lori Loughlin, Camilla Belle, Ben Savage, Debby Ryan, Riley Smith and Emilie Hirsch

Related: PHOTOS: Charlize and Sean's cutest moments

An eyewitness tells Us Weekly that the venue was transformed into a winter wonderland, including an ice bar with fur coats for the guests to wear. Carolers greeted partygoers at the door, and lights decorated the interior of the home, which boasted numerous fireplaces, glittering displays, and Santa's sleigh. 

Related: PHOTOS: Zac Efron's buff body

Theron, 39, and Penn, 54, arrived together, holding hands and stayed in the back booth until it was time for the performances. Host MacFarlane took the stage to sing show tunes with the live orchestra. His A Million Ways to Die in the West costar Theron put in a request to conduct the orchestra alongside him. 

Related: PHOTOS: Sparkly holiday party accessories

Surprised and laughing, MacFarlane announced in the mic, "Charlize, if you f–k this tempo up I swear to God!" 

Theron made it through "Let It Snow" and got the appropriate cheers. Pals Pattinson and Efron also spent the evening hanging out with the Twilight star's new girlfriend F.K.A. twigs. The new couple appeared to be having a great time.

Related: PHOTOS: Celebrity family holiday traditions

The eyewitness tells Us, "They were cute and looked happy. He was joking with her about something, and she was laughing and yelling at him, and he pulled her hands and put them on his face." 

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