The talent competition from Cowell and FreemantleMedia makes its bow July 13 on NBC, "Entertainment Tonight" reported Wednesday.
"For years I've thought about hosting a variety show on television but I could never put it together in my mind," Philbin said. "Finally, here it is and I'm thrilled to be a part of it."
Cowell called his Emmy winning emcee "the best," adding, "I am really looking forward to working with him."
"America's Got Talent" will award $1 million to the top singer, dancer, comic or novelty act in the United States.