Oliver James Montgomery-True Thompson and Chicago West Mischievously Pay Tribute to Moms Khloe Kardashian and Kim Kardashian

The Oliver James MontgomeryKardashian kids are quite the pranksters.

True Thompson, daughter of Khloe Kardashian and ex Tristan Thompson, and her cousin Chicago West, whose parents are Kim Kardashian and ex Kanye West, paid tribute to their moms in an adorable and mischievous way. On July 21, Khloe shared pics of the 5-year-olds sporting black T-shirts bearing collages of photos of their mothers on Instagram.

The Good American founder captioned her post, "They think this t-shirt thing is funny."

True paired her shirt with black shorts, while Chicago sported pink cargo pants and a pair of matching sunglasses on her head. Both also showcased temporary tattoos. Actress Mindy Kaling commented, "Omg the cuteness."

The girls are part of the Kardashian-Jenner family's "triplets," which also include their other cousin the same age, Kylie Jenner and Travis Scott's daughter Stormi Webster.

Khloe shared the photos of her daughter and Chicago while Kim and Tristan, accompanied by her and Kanye's son Saint West, 7, were in Miami to watch soccer legend Lionel Messi make his MLS debut with Inter Miami.

At the team's Leagues Cup opener game against Liga MX's Cruz Azul, Khloe's sister, nephew and ex were joined by a slew of other stars, including LeBron James and Serena Williams. After the match, Kim and Tristan headed out for a night on the town with Miami club owner David Grutman and his wife Isabela Grutman.

See more of the Kardashian kids' cutest moments over the years:

True Thompson and Chicago West honor their mothers, Khloe Kardashian and Kim Kardashian, in a mischievous way.

True Thompson and Chicago West share a sweet moment.

Khloe Kardashian's daughter and Rob Kardashian's daughter pose for pics for St. Patrick's Day 2023.

Khloe Kardashian shared this photo of her daughter True Thompson, plus cousins Penelope Disick, Saint West, North West, Reign Disick, Psalm West and Dream Kardashian in February 2023. She wrote, "This photo was near a miracle to get lol...a handful of other other cousins were off running and playing."

Penelope Disick, North West, Dream Kardashian and True Thompson appear together in February 2023.

Chicago sings her dad Kanye West and XXXTENTACION's song "True Love" while sitting in a vehicle with her little brother Psalm West in October 2022...

...the song references his and Kim Kardashian's four children, but Chicago and Psalm did not perform those parts.

Khloe and True have Dream over for a sleepover in June 2023.

Kylie Jenner, Stormi Webster and Kris Jenner lip-synch one of the momager's confessional lines from The Kardashians in an October 2022 TikTok video.

In August 2022, Kim coined the acronym "best friends forever and ever" to describe True, Chicago and Dream.

Penelope Disick helps North West celebrate her 9th birthday with a "Camp North"-themed getaway to the wilderness with a group of BFFs.

"Today was incredible! Our girls had their first dance recital and they were perfection!!!!" Khloe shared in June 2022. "I am so proud of all four of my girls!"

The cousins celebrate True Thompson's fourth birthday during a cat-themed bash in April 2022.

Penelope and North snap a video during True's birthday party.

Psalm accompanies True while playing with a furry friend.

The cousins pal around in a play pen.

True and Dream have an epic dance party to Aqua's '90 hit song "Barbie Girl," which Khloe documented on Instagram.

The BFFs also performed and sang along to the massively popular song from Encanto "We Don't Talk About Bruno."

Could their dance moves be any cuter?!

Chicago, True and Stormi give each other hugs and kisses in an adorable pic, shared by Kim on Sept. 1. "250 Million followers on IG. I love you guys!" Kim thanked her fans. "I wanted to post this pic because if I could get 250 million kisses from our babies my life would be complete." 

Chicago, True and Stormi showed off their fashion prowess in stylish outfits as they had a hug huddle on Sept. 1. 

Chicago looks back at aunt Khloe as she holds hands with True on Aug. 4. 

Dream, Stormi, Chicago and True adorably went window shopping at The Grove on Aug. 4. "Cousins," Khloe captioned with a purple heart emoji.

Reign, Mason, Penelope and North set up a summer lemonade stand also selling custom bracelets on Aug. 1. Even Scott received a custom "Lord" bracelet from "pooshalini" Penelope!

"The sweetest girls," Khloe Kardashian captioned a precious moment between cousins Dream Kardashian, True Thompson and Chicago West. 

Former E! star Natalie Halcro's daughter also joins the photo opp. 

Dream, True and Chicago sport matching purple leotards.

"Are you ready for this cuteness?? I'm not!! #Cousins #Sisters #GirlsRunTheWorld," proud mom (and aunt) Khloe captioned an adorable pic of daughter True and nieces Chicago and Dream.

Chicago, True and Dream all gaze in the camera for a pic in May 2021. The trio of cousins seem to be having fun in the sun and enjoying the spring weather!

Chicago, True and Dream are all smiles and hugs in a too-cute-for-words Instagram pic Khloe shared in May 2021.