Kylie Jenner causes controversy with new boyfriend!

Uh-oh… we smell drama! Kylie Jenner only turned 17 last month, and now's she's been linked to a man seven years her senior.

Friends close to the starlet say she's dating 24-year-old rapper Tyga.

The pair have been seen together on several occasions, most notably at Kylie's birthday party with Kendall and rapper Chris Brown:

A source told OK! magazine, "Kylie always had a crush on him; but as she got older and they started spending more time together, things took off romantically."

We can't imagine Kylie's big sis Kim will be too happy with the rumours, given that Tyga only recently split from his fiancée Blac Chyna – a model who is one of Kim's BFFs. Awkward!

Tyga addressed the rumours indirectly on his Twitter account earlier this week, saying he was just a family friend:

DONT BELIEVE THE RUMORS, BEEN FRIENDS WITH THE FAMILY FOREVER. WERE ALL JUST FRIENDS.

— T-Raww (@Tyga) September 8, 2014

This is definitely a new direction for Kylie, who has previously been linked to cute-as-pie Aussie pop singer Cody Simpson, as well as Will Smith's 17-year-old son Jaden.