One night on the Tonight Show, Johnny Carson asked McLean Stevenson how he was related to Sen. Adlai Stevenson III, of Illinois. McLean said, "Well right now he's my cousin, but if he ever get's elected president he will be my brother."
Actor McLean Stevenson was best known for his role as Lt. Col. Henry Blake on he TV series M*A*S*H. He was born in Normal, Illinois. He was the great-grandson of William Stevenson, brother of Vice President Adlai E. Stevenson, making him a second cousin once removed of presidential candidate Gov. Adlai E. Stevenson II. He was also the brother of actress Ann Whitney. His father, Edgar, was a cardiologist.
McLean attended Lake Forest Academy and later joined the Navy. After his service, he attended Northwestern University, where he graduated with a bachelor's degree in theater arts and was a proud and well-liked Phi Gamma Delta (Fiji) fraternity brother.