Click on photo below for gallery of Bruce's birthday.
Kris, who was married to Bruce for 22 years, gathered her children and stepchildren together for a large, family meal on Sunday.
In true Kardashian and Jenner style, the whole clan took to Twitter and Instagram to give fans a glimpse into their lively family affair.
CLICK ON PHOTO FOR GALLERY
Kris proved she was still on good terms with Bruce's children, as she posted snapshots of the group joking around with mini party hats, fake moustaches and full-rimmed glasses.
"Just another family Sunday night dinner!! @khloekardashian @leah_jenner @sprandoni #love2besilly," wrote Kris, posing next to her daughter Khloé, her stepson Brandon Jenner and his wife Leah Felder.
Khloé, whose father Rob Kardashian passed away in 2003, showed just how much fun she was having as she tweeted throughout the night and sent a particularly touching message to Bruce.
"Such a fun early Birthday dinner for my Brucey :) I am so lucky!!! I was blessed with TWO phenomenal fathers!!! Family first ♥," wrote Khloé.
"He deserves not one but TWO cakes. A few of his favorite things," added Khloé, next to a snapshot of Bruce's birthday cakes — one of a helicopter and the other of a golf ball, referring to the athlete's sporting ability.
Khloé then struck silly poses next to her younger half-sister, Kendall Jenner, and posted the montage of the pair clowning around on Instagram.
Kylie Jenner, the youngest of the Kardashian and Jenner clan, was not one to be left out as she gathered her half-sisters Kim and Kourtney Kardashian for a fun photo.
While the whole family showed they would not let Kris and Bruce's separation affect their reunions, Bruce was notably absent from the photos posted online.
The former couple have remained on good terms, and at the time of their announced split in October, Kris and Bruce insisted they would always love and respect each other.
"We are living separately and we are much happier this way," they revealed in a joint statement.
"But we will always have much love and respect for each other Even though we are separated, we will always remain best friends and, as always, our family will remain our number one priority."