Dennis Rush , former child star best known for his roles as a young Creighton Chaney opposite James Cagney in Man Of A Thousand Faces, and as Howie, pal of Opie (Ron Howard) on The Andy Griffith Show , has died. He was 74. His longtime friend, actor Keith Thibodeaux (who also appeared on the Griffith show but is better known for playing Little Ricky on I Love Lucy) , announced Rush’s death on Facebook, along with a photo. Thibodeaux told The Hollywood Reporter he died May 9. “I just got word that my old buddy Dennis Rush, a fine actor and a great friend passed away. What a shock .. He was with us as one of Opie‘s buddies. He’s the one sitting down,” Thibodeaux wrote. “I will miss him at the Andy Griffith festivals as we had so many stories to tell I’m just glad that I was able to pray with him last month at one of the festivals when he found out that he was diagnosed with leukemia.…