Patrick Schwarzenegger dresses up as Elvis Presley while his girlfriend

Patrick Schwarzenegger dresses up as Elvis Presley while his girlfriend Abby Champion appears as a ’90s princess at Kendall Jenner’s Halloween party

Kendall Jenner hosted a star-studded Halloween party at the Chateau Marmont in Los Angeles on Saturday evening.

Patrick Schwarzenegger, 30, and his girlfriend Abby Champion, 26, were among the many celebrities and influencers who partied the night away at the iconic Sunset Strip venue.

The son of Arnold Schwarzenegger, 76, and Maria Shriver, 67, made a very convincing Elvis in his elaborate overalls and sunglasses.

His model girlfriend of eight years stood out as a ’90s princess in a sparkling silver strapless mini dress, sheer white over-the-knee socks, silver opera gloves and a tiara.

The longtime couple were just two of the many celebrities in attendance, including Channing Tatum and Zoë Kravitz, Lori Harvey, Charli D’Amelio and Landon Barker, and even a brief appearance from Leonardo DiCaprio and his current girlfriend Vittoria Ceretti.

It's the king!  Patrick Schwarzenegger dressed up as Elvis while attending Kendall Jenner's Halloween party at Chateau Marmont in Los Angeles on Saturday

It’s the king! Patrick Schwarzenegger dressed up as Elvis while attending Kendall Jenner’s Halloween party at Chateau Marmont in Los Angeles on Saturday

Patrick and Abby first connected in September 2015 while hanging out together at the Nice Guy nightclub in West Hollywood.

Patrick made his first appearance on her Instagram in February 2016 and the two have been inseparable ever since.

Champion grew up in Birmingham, Alabama, and described her childhood as idyllic.

“It teaches you to have good manners, enjoy good food and reminds me of the importance of faith and family,” she shared in a 2016 interview with Vestavia Voice.

Her older sister Baskin Champion won the 2014 Miss Teen Alabama pageant and it was at that event that a modeling scout approached then 17-year-old Abby.

Almost a decade later, she walked the runway for Prada, Ralph Lauren, Chanel and many other brands and fashion houses.

And she supports her boyfriend’s acting and modeling career.

​​”I think the best thing about having her by my side is that she’s always on my side and wants the best for me and brings out the best in me,” Schwarzenegger told E! News.

Princess: Schwarzenegger, 30, and his girlfriend Abby Champion, 26, were among the many celebs and influencers who partied the night away at the iconic Sunset Strip venue

Princess: Schwarzenegger, 30, and his girlfriend Abby Champion, 26, were among the many celebs and influencers who partied the night away at the iconic Sunset Strip venue

Burning love: The son of Arnold Schwarzenegger, 76, and Maria Shriver, 67, made a very convincing Elvis in his elaborate overalls and sunglasses

Burning love: The son of Arnold Schwarzenegger, 76, and Maria Shriver, 67, made a very convincing Elvis in his elaborate overalls and sunglasses

Royalty: His model girlfriend of eight years stood out in a sparkly silver strapless mini dress, sheer white thigh-high socks, silver opera gloves and a tiara

Royalty: His model girlfriend of eight years stood out in a sparkly silver strapless mini dress, sheer white thigh-high socks, silver opera gloves and a tiara

Long-time couple: Patrick and Abby have been together since 2015

Long-time couple: Patrick and Abby have been together since 2015

“I always say that in a relationship you have to be each other’s biggest cheerleader.” Build each other up. And she does that for me.’

And the support goes both ways. For his loved one’s 25th birthday, he gave a sweet birthday tribute.

“Happy 25th birthday @abbychampion,” he wrote last year.

“LOVE THIS GIRL SO MUCH!! Such a hard worker. SO BEAUTIFUL. FAITHFUL. DRINK 2 CUPS OF COFFEE! LOVES ICE CREAM. LOVES HER SUGAR COCKTAILS. ALSO LOVE JESUS ​​AND AMERICA.’