The banquet room at the Hotel Bel-Air was transformed into a magical pink wonderland for the afternoon soiree.
The mom-to-be, who is expecting her first child - a girl - with National Basketball Association player boyfriend Tristan Thompson, wore a stunning, curve-hugging blush-colored dress that was embellished with embroidery and crystals for the pink-themed party.
Khloe paired the eye-catchy crystal embellishments adorned baby pink outfit with a matching overcoat and pumps as her blonde tresses and hoop earrings accentuated her beauty.
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Real Housewives of Atlanta star Kim Zolciak-Biermann and her daughter Brielle-Biermann were among the guest.
Khloe and Tristan Thompson's little one will also be decked out in a Givenchy Kids leather jacket for a mere $1,450.
"Khloe knows how important it is to grow up with a big family, with lots of siblings, so she thinks it would be great if her daughter had a brother right away", the source continued.
"There are pink roses and hydrangeas everywhere, it's like an fantastic pink garden with floor to ceiling flowers", shared the source. "More pictures to come!" she captioned a shot of her with older sister Kourtney Kardashian on Instagram.