Emergency services responded to a collision between a car and a pedestrian in St Kilda East on Friday night (July 7).
It is believed a man was crossing at the intersection of Dandenong Rd and Chapel St just before 6pm when he was struck.
The driver of the silver Toyota Corolla wagon was not injured and stopped at the scene.
A 77-year-old St Kilda man was taken to hospital with life-threatening injuries.
Police will investigate the circumstances surrounding the incident and the investigation remains ongoing.