Kylie Jenner
Kylie Jenner and Tyga had reunited recently after a brief break-up REUTERS

American reality television personality Kylie Jenner and rapper Tyga are not engaged. Rumours that the two are engaged started after the 18-year-old model was seen sporting a ring on her left hand.

A source told Hollywood Life: "It's a promise ring, as in 'I promise I'll be good, and for my good behavior will you marry me someday' ring."

A photo posted by King Kylie (@kyliejenner) on

"Tyga knows Kylie has given him way more chances than he deserves, so to express his appreciation, he wanted to present her with a grand gesture," the insider added.

"Meanwhile, Kylie wants to flash anywhere and everywhere because her friends, and especially her sisters, have been telling her to dump Tyga because he doesn't treat her well enough and he'll never commit!" the source continued. "That said, they have been talking marriage. Both of them know they're better off waiting, but they're impulsive kids, so who knows what can happen?"

The pair had been dating since 2014 when the Keeping Up with the Kardashians star was still a minor. The duo made their relationship official in February 2015. Jenner and Tyga had briefly broken up in April, however, they reunited recently.