The pair gave their bud a kush present for his 36th b-day on Wednesday.
The reality star, who is celebrating his 36th b-day, took to his Instagram story on Wednesday to share a video of the incredibly dope present, which included a box of goods from an artisanal cannabis company.
"You guys really stepped it up on this one," Jenner said, showing off the wooden box filled with beautiful and individually wrapped cannabinoid concoctions.
"We got the birthday card," Jenner added, revealing a hand-written salutation, tied with a string around what appeared to be a bunch of flowers, "attached to the weed bouquet!"
"I have never seen one of these in my entire life. Oh my god," Jenner said in awe. "Happy birthday to me."
As for the card, the cheeky greeting read, "WEED like to wish you a Happy Birthday! Love you! Miley & Kaitlynn."
ET has learned that Cyrus, who is an investor in Lowell Herb Co., put in a request a few days ago to have this birthday gift sent to Brody on behalf of herself and Carter, and that the gift, in total, costs around $1,000. Cyrus is known for sending cannabis bouquets to her friends. In the past, she has gifted the bouquets to her sister, Noah Cyrus, and her "Nothing Breaks Like a Heart" collaborator, Mark Ronson.
Carter later replied to Jenner's post on her own Instagram story, sharing his video and adding, "Happy Bday @brodyjenner !!"
Meanwhile, the break-up between Jenner and Carter has been relatively amicable, while the drama between Cyrus and her estranged husband, Liam Hemsworth, has been dominating headlines in recent weeks, as the bond between Carter and Cyrus has reportedly grown stronger.
For more on all the complex and surprising web of relationship drama, check out the video below.
Liam Hemsworth Heads to a Bar With Friends Amid Miley Cyrus' Continued Outings With Kaitlynn Carter