Though the two posed separately on the red carpet, they reportedly arrived together at the ceremony.
When Jenner hit the stage to present an award to Nicki Minaj for Best Rap/Hip-Hop album, Tyga was one of the people to stand up and clap for her.
The day before, Kylie posted a mysterious Snapchat of two people lying next to each other with the caption, "Everyone needs to chill.”
On Friday, it had been reported that Kylie and Tyga had called it quits. A source told People, "She's caught him lying and talking to other girls behind her back before, and this was the last straw. [She] feels super betrayed and is just so pissed off, damaged and hurt about it."