Will Smith has resigned from the Academy of Motion Picture Arts and Sciences over his slap of comedian Chris Rock at the Academy Awards on Sunday night.

The actor made the announcement after the academy began a review of the shocking TV moment about which Smith said his actions were “shocking, painful, and inexcusable.” Smith faced suspension, expulsion, or other punitive measures with the board of governors scheduled to meet April 18 and said he had received a disciplinary hearing notice.