The victims were about to park their car in the 1500-block of North Dearborn Street at about 9:10 p.m. when police said two men in dark clothing approached.
One of the men was armed and demanded the keys to the car. The victims complied and one suspect fled in the victim's Porsche and the other fled in a maroon vehicle northbound in an alley, police said.
No one was injured. Area Central detectives are investigating and no one is in custody.