Rex Elvie Allen was an American film actor, singer, and songwriter.

He appeared as himself in the 1959 TV documentary Disneyland '59, the narrator of the featurettes: The Wetback Hound, The Hound That Thought He Was A Raccoon, Yellowstone Cubs, A Country Coyote Goes Hollywood, and Run, Appaloosa, Run, the feature films: The Legend of Lobo, The Incredible Journey, and Charlie, the Lonesome Cougar, the Disneyland episodes "The Best Doggoned Dog in the World" and "The Horse of the West", the Walt Disney's Wonderful World of Color episode, "An Otter in the Family", the Wonderful World of Disney episodes "Ringo, the Refugee Raccoon", "The Secret of Old Glory Mine", and the announcer in Walt Disney World's 15th Anniversary Celebration, and the narrator and Windwagon Smith in The Saga of Windwagon Smith.

For the Disney parks, he provided the voice of the Father in the World's Fair and Disneyland versions of Carousel of Progress, the Grandpa and pre-show film narrator in the current version of the same show at Walt Disney World, and the dog that sang "Who Shot the Hole in My Sombrero" in America Sings.

He can also be heard on the soundtrack of "There's a Great Big Beautiful Tomorrow" in the Walt Disney's Wonderful World of Color episode, "Disneyland Goes to the World's Fair".

He died 15 days before his 79th birthday.

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