A 30-year-old man from Arbroath is in a critical condition at Ninewells Hospital in Dundee after his car was involved in a collision with an articulated lorry.
The collision between the Volkswagen Golf and the lorry occurred on the A92 at Inverkeilor around 7pm on Monday.
The driver of the lorry was uninjured.
Police Scotland closed the road to begin their investigation into the cause of the incident.
Anyone who witnessed the collision should contact Police Scotland on 101.