Are George Hamilton IV and george hamilton actor related?

They don't seem to be. George Hege Hamilton IV, a country singer with the Opry, is two years older and was born in North Carolina. George Stevens Hamilton IV, the actor, was born in Tennessee in 1939.

No.

George Hamilton IV is 74 years old (birthdate: July 19, 1937).

George Hamilton IV was born on July 19, 1937.

George Hamilton IV was born on July 19, 1937.