The professional dancer, who won season four of the U.S. reality competition, has been slapped with two felony counts of willfully injuring his girlfriend after reported disputes in April (16) and June (16), when he reportedly cornered his partner in a Los Angeles coffee shop and then hurled a glass vase at a female bystander who had tried to step in, according to TMZ.com.

The vase attack has landed him a felony charge for assault with a deadly weapon, while the 27-year-old has also been hit with two misdemeanours for disobeying a criminal protective order issued to his girlfriend, as well as simple battery and vandalism charges.

The restraining order was issued after Allen was convicted of "willfully injuring a girlfriend" in January (16), reports Deadline.com.

He is due to be arraigned in a Los Angeles court later on Thursday (14Jul16), when prosecutors are expected to request the judge set bail at $270,000 (£202,475).

If convicted, Allen faces spending over a decade behind bars.

After winning So You Think You Can Dance in 2008, Allen went on to show off his dance moves in 2010 movie StepUp3D, as well as the 2011 Footloose remake.

He was serving as a mentor to young contestants on the current season of So You Think You Can Dance, but recently pulled out of the competition for reasons which were not revealed. He was noticeably replaced by another alum during the first live show which aired this week (11Jul16).