Although Kim Kardashian wasn't seen arriving at Kendall Jenner's birthday party on Wednesday, the mother-of-two is said to have attended a dinner for the 21-year-old earlier in the night by sneaking in through a private entrance.

Sources tell TMZ that the 36-year-old was surrounded by three bodyguards at all times during the intimate gathering at Catch restaurant in LA.

MORE: First Photo of Kim Kardashian Surfaces on Twitter After Robbery — See it Here!

An insider claims the brunette beauty paid each security officer $100 per hour and didn't wear any jewelry to the pre-party, which only included about 20 guests.

kim kardashian bodyguard getty images

It was also revealed this week that Kim and hubby Kanye West parted ways with their longtime bodyguard Pascal Duvier.

The 43-year-old was at a nightclub with Kendall and Kourtney Kardashian when Kim was held up at gunpoint in Paris last month.

MORE: Election Day Giveaway! Enter to Win a $50 Old Navy Gift Card

"Kim and Kanye are reassessing their security detail now. Kanye is freaking out — this really threw him for a loop," a source previously told Entertainment Tonight. "There will be a lot of things that change now in terms of security, especially with the children."

Scroll through the gallery below to see photos from Kendall's star-studded birthday bash!