Today marks what would have been Elvis Presley's 80th birthday, and thousands of fans from around the world are gathering in Memphis, Tennessee, to attend special events that have been scheduled to commemorate the milestone at the Graceland estate and around the city.

A ceremony will be held that will include a proclamation decreeing today to be Elvis Presley Day in Memphis and the cutting of a specially designed birthday cake.

Presley's daughter, Lisa Marie, and ex-wife, Priscilla, both will take part in the ceremony, which also will feature a group sing-along of "Happy Birthday" to Elvis, who died in August 1977 at the age of 42.