Firefighter Tatum reporting for duty.

Khloé Kardashian’s 9-month-old son looked too cute in a red helmet at his cousin Psalm’s fiery 4th birthday party Saturday.

The “Kardashians” star snapped a rare selfie with her and Tristan Thompson’s baby boy during the bash, as well as her 5-year-old daughter, True.

Kardashian posted the photo to Instagram the following day, captioned with three bear emojis.

The social media upload came three days after the US Sun revealed Tatum’s name, which the Good American co-founder has yet to confirm.

Notably, Kardashian did not show her youngest child wearing the monogrammed firefighter uniform that Kim Kardashian gifted every party guest.

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Khloé did, however, filmed True’s outfit on her Instagram Story, writing, “How cool is this!”

Psalm wore his own firefighting gear while hitting a firetruck piñata, riding in a real vehicle and posing with firemen balloons.

The birthday boy’s party venue was made to resemble a real firehouse, with an additional bounce house, ball pit and Cane’s food truck. Local firefighters even showed up in uniform.

“Gotta love our firefighters who help us in Calabasas all the time!” Kim, 42, gushed via Instagram. “We love you guys.”

The Skims creator welcomed Psalm via surrogate in May 2019, nearly two years before she and Kanye West called it quits.

Khloé’s baby boy was also born with the help of a gestational carrier in July 2022.

While the reality star has kept her little one’s life private, she did gush in April about what a “quiet” and “happy” child Tatum is.