Frankie Avalon’s birthday is today, and perhaps his greatest gift is his iconic role in Grease. 47 years ago, Grease was released in cinemas, which starred the late Olivia Newton-John and John Travolta in leading roles, and the teen heartthrob Avalon as the Teen Angel in a dream sequence. However, another icon, the king of rock and roll himself, almost had Avalon’s role.