The reality TV mogul and the rapper will reportedly split after nearly seven years of marriage.
The gloves were off for this lot.
Kylie Jenner, Scott Disick and The Weeknd were among the maskless celebrity attendees.
While trick-or-treating is out of question for many of us, these stars are still helping us get in the spirit.
David Schwimmer's name quickly began trending after the reality star's post.
Of course, Kanye had the hologram version of Robert Kardashian describe the rapper as the "most genius man in the whole world".
The youngest Kardashian sister told Ellen DeGeneres that she doesn't want haters to "overshadow all the greatness" of the private-island bash.
Twitter users have been sharing their own hilarious takes on her extravagant birthday celebrations.
Her sister Kourtney Kardashian, meanwhile, has seemingly endorsed Kanye West for president.
Kim Kardashian, Viola Davis and Gabrielle Union were among those who sent heartfelt messages to the couple.