Reality TV personality Kylie Jenner was spotted flaunting her cleavage while she was out with her rumoured beau and rapper Tyga.

The 18-year-old took to Instagram to show off her cleavage by uploading some photographs which see herself wearing an extremely-low-cut top, reports aceshowbiz.com.

Kylie uploaded an image of her in front of a mirror and captioned it: "Last Night."

She was seen wearing a black long-sleeved top, which put her cleavage on display, and a pair of black trousers which she teamed with a fringed leather belt that looked more like a hula skirt.

Another photograph shows the reality TV personality walking in front of Tyga, who also donned a black shirt.

The pair seemingly went out for a date that night as they headed to Kardashian family's favourite restaurant, to have dinner.

Before showing off her ensemble, Kylie uploaded a photograph of an Hermes bag she carried that night.

The image captures the crocodile-skin rectangular clutch on Kylie's lap as she seemingly sits inside a car.