Franklin Nathaniel Jonas is an American singer and actor. Jonas voiced Sōsuke in the English dub of the 2008 film Ponyo and was a recurring character in the Disney Channel series Jonas. He also appeared in a minor role in the Disney Channel original film Camp Rock 2: The Final Jam. He has also made appearances on Married to Jonas on E! which follows the life of his brother Kevin Jonas. In 2009, Jonas won "Choice Breakout TV Star – Male" at the Teen Choice Awards. In 2023, he launched a music career as a singer and songwriter. He has released two singles and one extended play, Sewer Rat. Since 2025, he has released music with his band, Franklin Jonas & The Byzantines.