Pittsburgh Police from Zone 2 were called to 11th Avenue at Liberty Avenue for reports of a stabbing around 6:45 p.m. outside the Greyhound bus station.
Arriving units found one male victim with a stab wound to the arm and a wound to the back of the head. Officers applied a tourniquet to his arm until medics arrived.
He was transported to the hospital in stable condition. The second male was apprehended by police inside the station without incident.
The two males had reportedly been arguing inside before moving out onto the sidewalk where the stabbing occurred. The actor was positively identified by the victim.
He will be transported to the Allegheny County Jail after he is treated at the hospital for an injury to his hand.