It happened around 12:30 a.m. in the Hunting Park section of Philadelphia.
The victims, a 23-year-old man and an 18-year-old woman, were sitting in an SUV parked along the 400 block of West Paul Street.
Police say someone walked up and opened fire, unleashing more than 2 dozen bullets into the car.
Both victims were rushed to Temple Hospital, where they remain in critical condition.
A motive for the shooting is still unclear. No arrests have been made.