Mickey Mouse did not talk in his first few appearances. While he made his public debut in the sound-synchronized short Steamboat Willie in 1928, he primarily communicated through whistling, laughing, and physical gestures. It wasn't until his ninth film, The Karnival Kid (released in May 1929), that he spoke his first words: "Hot dogs! Hot dogs!" Walt Disney himself provided the original voice for Mickey, establishing the character's signature high-pitched falsetto. Since that high-fidelity debut, Mickey has become a talkative icon, but his early "silent" era remains a significant part of animation history, showcasing how Walt Disney used music and sound effects to give the character a personality even before he had a formal vocabulary. In 2026, historians still point to The Karnival Kid as the high-fidelity moment the "Mouse" truly found his voice.