Caan, 75, who is best known for his role as Santino 'Sonny' Corleone in 1972's "The Godfather", was suffering from chest infection, reported Aceshowbiz.
The actor has since been discharged from the hospital after being diagnosed with a mild chest infection. A representative for Caan said he is doing fine.
"The Outsider" star is planning to rest for the next few days before returning to work. He is currently in Toronto filming new movie "Operation Insanity" with Paul Sorvino.
Caan has been filming several films back to back. He has three movies lined up, including, "The Throwaways", "Wuther High School" and "Mikow".