Dwayne Johnson said he came up with the idea for his character to be such a huge Elvis Presley fan, and suggested the idea to the writers, who loved it and added it to the script. Johnson later said that when they asked how he came up with the idea, Johnson responded that he is Elvis' biggest fan, and much of the Elvis memorabilia his character owns actually belongs to Johnson.
Dwayne Johnson has said that this film will be the last film in which he will be credited as "The Rock".
Two bulldogs, named Tubbs and Tank, shared the role of Spike.
Includes a lot of references to Elvis Presley, including songs and posters. Those were added by director Andy Fickman and Dwayne Johnson who both are Elvis fans.