Jet Propulsion[6] (voiced by Ashleigh Ball)[7] is the title character of the show and is a humanoid alien. He has red hair and can stretch his body, as his parents can. He is excitable, energetic, and goofy. He is tall for his age. Jet is 63 years old in Bortronian years, as revealed in "Earthday Birthday". He was instantly popular with the other children the moment he arrived on Earth. He sees the mundane world as a vast and exciting place and even thinks that words are exciting, such as "surprise", claiming it to be a funny Earth word. He is named after the Jet Propulsion Laboratory.[8] He is shown to be extremely kind, even to people who are mean to him, such as Mitchell. He possibly likes Sydney, because he danced with her in "How Come the Moon Changes Shape?", and is shown to possibly like Sean in "Back to Bortron 7".
Jet Propulsion has been suggested to play 5 roles. Click below to see other actors suggested for each role, and vote for who you think would play the role best.
