Inside Seth MacFarlane’s Christmas Party With Leonardo DiCaprio, Rachel Platten, Nick Viall, More 

Credit: Charley Gallay/Getty Images for The Grove

Inside Seth MacFarlane’s Christmas Party With Leonardo DiCaprio, Rachel Platten, Nick Viall, More 

’Twas the night of Seth MacFarlane’s Christmas party and he had a full house! The Family Guy creator held his annual holiday bash in Beverly Hills on Saturday, December 15. According to a source, Leonardo DiCaprio went the party with his girlfriend, Camila Morrone. The model’s mom, Lucila Solá, was also by the couple’s side during the evening. An insider told Us Weekly last month that the twosome are “very serious” and have even “talked about getting engaged.” Paris Hilton, Michael B. Jordan and Sasha Baron Cohen also attended the holiday get-together on Saturday night, per the source, who told Us that MacFarlane performed at the party with Rachel Platten. The singer, who is expecting a baby girl with husband Kevin Lazan, sang a cover of “The Christmas Song” with the host. Elizabeth Gillies also took the stage at the bash, per the Dynasty star’s Instagram Stories. The Orville creator also invited a series of reality stars to his Christmas celebration, including Bachelor alums Nick Viall and Dean Unglert. Scroll through to see an inside look at MacFarlane’s 2018 bash:

Credit: Charley Gallay/Getty Images for The Grove

Inside Seth MacFarlane’s Christmas Party With Leonardo DiCaprio, Rachel Platten, Nick Viall, More 

’Twas the night of Seth MacFarlane’s Christmas party and he had a full house! The Family Guy creator held his annual holiday bash in Beverly Hills on Saturday, December 15. According to a source, Leonardo DiCaprio went the party with his girlfriend, Camila Morrone. The model’s mom, Lucila Solá, was also by the couple’s side during the evening. An insider told Us Weekly last month that the twosome are “very serious” and have even “talked about getting engaged.” Paris Hilton, Michael B. Jordan and Sasha Baron Cohen also attended the holiday get-together on Saturday night, per the source, who told Us that MacFarlane performed at the party with Rachel Platten. The singer, who is expecting a baby girl with husband Kevin Lazan, sang a cover of “The Christmas Song” with the host. Elizabeth Gillies also took the stage at the bash, per the Dynasty star’s Instagram Stories. The Orville creator also invited a series of reality stars to his Christmas celebration, including Bachelor alums Nick Viall and Dean Unglert. Scroll through to see an inside look at MacFarlane’s 2018 bash:

Credit: Courtesy Dean Unglert/Instagram

Bachelor Bros

“Holiday parties w @nickviall,” Unglert captioned an Instagram photo of himself and Viall both decked out in their holiday best on Saturday.

Credit: Courtesy Jessica Kantor/Instagram

Selfie Break

Olivia Munn was all smiles in a sweet snap from the party with friend Jessica Kantor. 

Credit: Courtesy Kennedy/Instagram

Dapper Dudes

30 Rock alum Jack McBrayer looked handsome in a suit as he posed for a pic with hospitality entrepreneur Robert Kennedy. 

Credit: Courtesy Jessica Lowndes/Instagram

’Tis the Season

Actress Jessica Lowndes shared an Instagram video of her and her friends singing Christmas songs on their way to the event. 

Credit: Courtesy Noah Jaemes/Instagram

Dressed for the Occasion 

Bill Nye attended the Christmas party in a holiday-themed bow tie.

Credit: Courtesy Anne Winters/Instagram

Santa Baby 

13 Reasons Why’s Anne Winters rocked red at the party.

Credit: Courtesy Skyler Samuels/Instagram

Sparkle Season 

Actress Skyler Samuels wore a long-sleeve, sparkly dress for the occasion. She also posed in front of a giant sign that read “’Twas The Morning After Seth’s,” a play on the classic holiday poem ’Twas The Night Before Christmas.