(Photo Credit: FayesVision/WENN.com)

Khloe Kardashian showed off her best assets for boyfriend French Montana at his 30th birthday party.

Joined by her sisters Kim Kardashian and Kylie Jenner and mom Kris Jenner, Kardashian feted her Moroccan rapper boyfriend, along with other A-list guests, such as Snoop Dogg and P. Diddy, at the Ciroc-sponsored affair Sunday in Los Angeles.

Kardashian wore a Grecian-inspired gown with slits up to her hip, allowing a peek at her toned thighs. New mom and older sister Kim was more demure in a black turtleneck and tight leather pencil skirt, while little sister Kylie rocked long blonde extensions, a short black minidress and thigh-high boots.

A photo posted by Kim Kardashian West (@kimkardashian) on Nov 11, 2014 at 11:05pm PST

Kim shared a photo of her with her sisters and mom surrounding the birthday boy. "#Family #HappyBdayFrench," she captioned the shot.

#Family #HappyBdayFrench

A photo posted by Kim Kardashian West (@kimkardashian) on Nov 11, 2014 at 11:34pm PST

Though Kim's other half, Kanye West, who worked with French on his upcoming Mac & Cheese album, was not spotted at the soiree, Kris Jenner brought along new boyfriend Corey Gamble.

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Kardashian and French Montana, whose real name is Karim Kharbouch, have been dating since the spring but have not been photographed together in recent months.

Despite speculation of a breakup, Montana told Us Weekly last month, "She's my baby forever. She's good. She's the best. There's no bad blood with her. I love how she is. She inspires me as a person. I'm sure I inspire her in many different ways. We just have that special relationship. Right now we're in a special zone… She's a beautiful person. I don't think a lot of people know how beautiful she is."

Kardashian also made her feelings clear in a sweet tribute she shared just prior to the birthday celebration.

Posting a shot of the two of them on a beach, she wrote on Instagram, "Happy birthday baby boy! In only a short amount of time we have created timeless memories. Happy birthday to a man who genuinely lives life to its fullest. "What's understood doesn't need to be explained" @frenchmontana I can't wait to celebrate life with you tonight! You deserve it!!"

A photo posted by Khloé (@khloekardashian) on Nov 11, 2014 at 2:22pm PST