According to ETOnline, the baby boy was born on Saturday in a Los Angeles hospital. The new son of the Miami Vice and Nash Bridges star weighed 7 pounds and was 27.5 inches long.
Johnson, 56, has been married for 7 years to Kelly. They have two other children, a son, Jasper, and a daughter, Grace.
A representative for Johnson said that the star is, "over the moon times six".
Don Johnson is also the father of a daughter, Dakota, from his previous relationship with actress Melanie Griffith.