While many have their judgements about "40 Mill" rapper Tyga and 17-year-old Kylie Jenner's alleged relationship, they've yet to face any substantive problems as a couple. That is, until Sunday night when Tyga ditched his own pre-birthday bash because the club wouldn't let underage Kylie through those velvet ropes.

According to TMZ, sources at Greystone Manor revealed that Tyga pleaded with the Club to let Kylie in for the night, even attempting to push back his arrival time while negotiating Kylie's entrance. After several phone calls throughout the day, however, the popular LA hotspot wouldn't budge, which led to Tyga pulling out of the scheduled appearance.

The club is reportedly attempting to re-schedule, but says the 21-and-over rule isn't changing so it may not make a difference.

Check out pics of Tyga and Kylie above.

Source: TMZ