The 21-year-old pop star took to Instagram to post a picture of Jenner and Corey Gamble, a tour manager with SB Projects who is part of his management team, reported People magazine.
"Hottest couple in the game," Bieber captioned the photo.
The 59-year-old "Keeping Up with the Kardashians" and Gamble, 34, are rumoured to be dating since October 2014, a year after Kris announced her split from Caitlyn Jenner after 22 years of marriage.