Spotted: Baby Boy Thompson living his best firefighter life.

On May 7, Khloe Kardashian shared a new Instagram pic of her and Tristan Thompson's son, 9 months. In the photo, a selfie taken outside, the tot wears a red, plastic firefighter's cap and sits on his mom's lap beside her and his big sister True Thompson, 5.

Khloe captioned the pic with three bear emojis, while one of her besties, Malika Haqq, commented, "Ohhh my loves."

The photo appeared to have been taken at a recent fire truck-themed early birthday party for Kim Kardashian and ex Kanye West's son Psalm West, who turns 4 on May 9. The bash featured fire truck-themed refreshments and balloon art. Guests also got to ride in a real fire truck with visiting firefighters.

Khloe and Tristan have not revealed the name of their second child, who was born via surrogate last July. She has, however, shared several pics of their son on Instagram and also showed her first moments bonding with him in the hospital on her family's Hulu series The Kardashians last year.

On the show, Khloe also tells her mom Kris Jenner that she wants her second baby to have a name that start with T, and on The Jennifer Hudson Show this past April, she confirmed it will. At Psalm's party, guests received personalized firefighter costumes, and one designed for Khloe and Tristan's son simply read, "T. Thompson." Meanwhile, fans await the Kardashians star's big announcement.

"I've been waiting for the premiere of our show and I didn't know it was going to be this far out," the Good American founder added on the talk show. "So now, if my daughter outs me, I'm screwed."

Season three of The Kardashians premieres May 25.

Meanwhile, see more photos of the Kardashian-Jenner family at Psalm's birthday party below:

Khloe appears with her and Tristan Thompson's baby boy, whose name has not been revealed publicly, and daughter True Thompson, 5.

Firefighters from a station in Santa Fe Springs, Calif. were invited to appear at Psalm's fourth birthday party in May 2023.

Psalm vs. a piñata.

Rob Kardashian's daughter takes some swings.

Khloe Kardashian and Tristan Thompson's daughter tries her luck with the piñata.

Kim Kardashian appears with her son.

Kim Kardashian and Khloe Kardashian ride in a fire truck.

The birthday boy blows out his candle.