Producers of Speed-the-Plow filed a grievance with Actors' Equity Association against actor Jeremy Piven for abruptly leaving the Broadway show citing health concerns, reported The New York Times.

He withdrew from the play due to medical necessity on the advice of his doctors, after he was hospitalized and warned by his physicians that enforced rest was necessary in order to avoid serious medical problems, including a heart attack, Samantha Mast, Piven's publicist, said in a statement Friday.

The date for the grievance proceedings was not announced.

Piven also denied reports that the Emmy-award wining star of HBO's Entourage had been partying late at night and was bored with the play.