The Road Runner is the fastest bird on earth and a fictional character in the Looney Tunes franshise. vocalizes only with a signature sound, "Beep, Beep", and an occasional tongue noise. The "Beep, Beep" was recorded by Paul Julian. He is always one step ahead of his predator, Wile E. Coyote.
He is also voiced by Frank Welker in the TV show, The Looney Tunes Show.
Like the rest of the Looney Tunes characters, he also got a new look in The Looney Tunes Show.
He is also one of a few characters that only makes sound effects other being Wile E. Coyote (although he does not make any sound effects, like Road Runner does).