Kim Kardashian throws a lavish firefighter-themed birthday party for her youngest child Psalm

Psalm West celebrated his upcoming fourth birthday on Saturday at a lavish party hosted by his mother, Kim Kardashian, who shared several photos and videos from the event on her Instagram story.

The 42-year-old reality TV personality went all out for her youngest son, who turns four on Tuesday, by pulling out all the stops for a firefighter-themed birthday party.

The entrepreneur, who recently reconnected with her ex Pete Davidson at the Met Gala, was also joined by her younger sister Khloe, who appeared in several photos and videos taken at the event.

Kardashian began by sharing a video of several Calabasas firefighters, who were invited to the event, standing in front of a vintage fire truck.

The social media figure then went to “Psalm’s fire department” and showed a large mural showing her son responding to a fire alarm.

Special occasion: Psalm West celebrated his upcoming fourth birthday on Saturday at a lavish party hosted by his mother, Kim Kardashian, who shared several photos and videos from the event on her Instagram story

Birthday girl: The 42-year-old reality TV personality went all out for her youngest son, who turns four on Tuesday, by pulling out all the stops for a firefighter-themed birthday party

Birthday girl: The 42-year-old reality TV personality went all out for her youngest son, who turns four on Tuesday, by pulling out all the stops for a firefighter-themed birthday party

The influencer also showed how her son posed in front of a balloon sculpture that showed a firefighter hosing down a fire.

Psalm was later seen looking at the mural, which he seemed particularly impressed with.

Kardashian showed off a mocktail station she set up for the event in one of her other clips.

The reality TV personality also had custom plate stickers printed that read, “Psalm turns 4!”

The entrepreneur then gave her fans a look at “Psalm’s firehouse,” where revelers could get their hands on custom-made “Psalm merchandise.”

Many of the guests were given firefighter costumes with their first names printed on the back of their jackets.

She then showed off one of the event’s dessert tables, which featured several Dalmatian-themed cookies, cupcakes, and marshmallow sticks, and also had a churro stand installed at the event.

Kardashian later donned her own custom fire jacket and held her son’s hand as they walked around the party grounds.

No expense spared: The entrepreneur then gave her fans a peek inside 'Psalm's firehouse', where revelers could get their hands on custom-made 'Psalm merchandise'

No expense spared: The entrepreneur then gave her fans a peek inside ‘Psalm’s firehouse’, where revelers could get their hands on custom-made ‘Psalm merchandise’

Staying close: Kardashian later donned her own custom firefighter jacket and held her son's hand as they walked through the party grounds

Staying close: Kardashian later donned her own custom firefighter jacket and held her son’s hand as they walked through the party grounds

Unforgettable!  Several of the party's guests took a ride in a vintage fire truck

Unforgettable! Several of the party’s guests took a ride in a vintage fire truck

Sweet treats: She then showed off one of the event's dessert tables, which featured several Dalmatian-themed cookies, cupcakes, and marshmallow sticks, and she also had a churro stand installed at the event

Sweet treats: She then showed off one of the event’s dessert tables, which featured several Dalmatian-themed cookies, cupcakes, and marshmallow sticks, and she also had a churro stand installed at the event

The reality TV personality held her child lovingly as the partygoers all sang Happy Birthday.

The entrepreneur’s youngest son then tried to break open a fire truck-shaped pinata, and he was later given a high five by one of Calabasas’ firefighters.

She proceeded to show off a rolled ice cream stand set up for the party.

Kardashian provided the party guests with their own Dalmatian stuffed animals, and each received a “certificate of adoption.”

The social media mainstay went on to share videos of various dessert and candy tables set up for guests.

Kim and Khloe were later spotted riding the vintage fire truck, with the latter posting a photo of her daughter True, age five, wearing a T-shirt with her aunt’s picture on her Instagram story.

The 38-year-old’s daughter also received one of the custom-made firefighter jackets.

Psalm’s older sister North shared a video on her TikTok account of her taking a ride in the fire truck with her friends.

Having fun: The entrepreneur's youngest son then tried to crack open a fire truck-shaped pinata, and he was later given a high-five by one of the Calabasas firefighters

Having fun: The entrepreneur’s youngest son then tried to crack open a fire truck-shaped pinata, and he was later given a high-five by one of the Calabasas firefighters

Having fun: Kim and Khloe were later seen riding the vintage fire truck

Having fun: Kim and Khloe were later seen riding the vintage fire truck

Showing off: Khloe posted a picture of her daughter True, age five, wearing a t-shirt with her aunt's picture on her Instagram story

Showing off: Khloe posted a picture of her daughter True, age five, wearing a t-shirt with her aunt’s picture on her Instagram story

Proud mom: The entrepreneur later shared a selfie with both True and her baby boy taken at the event

Proud mom: The entrepreneur later shared a selfie with both True and her baby boy taken at the event

Family affair: Psalm's older sister North shared a video on her TikTok account of her taking a ride in the fire truck with her friends

Family affair: Psalm’s older sister North shared a video on her TikTok account of her taking a ride in the fire truck with her friends

Kardashian shares Psalm and North, age nine, with her former husband Kanye West.

The influencer and the 45-year-old rapper tied the knot earlier in 2014, and they also share son Saint and daughter Chicago, aged seven and five.

The former couple eventually separated and their lengthy divorce was finalized last year.

The artist has since moved on to Bianca Censori, whom he married in a non-legally binding ceremony.