Kylie Jenner has been sporting a diamond ring on her wedding finger for most of the summer, but now she has finally revealed the reason behind it.

As her beau performed at Provocateur nightclub in New York last night, Kylie took to Snapchat to reveal the ring is a PROMISE ring. Ahhhh.

She shared a photo of the pair holding hands and wrote: "If this is my promise ring I wanna know what my engagement ring gonna look like."

Kylie's brother-in-law Kanye West recently signed Tyga up to his record label, so it seems he could be in the Klan for good.

But then again, you never know with this family.