Kylie Jenner buys Tyga a promise ring

Model Kylie Jenner has bought her erapper boyfriend Tyga a promise ring to match the jewel he bought her.

The 19-year-old beauty got emotional a few months ago when her beau splashed out on a diamond sparkler as a sign of his commitment but she's now returned the gesture by getting him a huge rock for his finger, reported Female First.

Taking to her Snapchat account on Thursday, the blonde beauty uploaded a photograph of their glitzy jewels and accompanied it with, "If this is my promise ring I wanna know what my engagement ring gonna look like. (sic).