Yonas Kibreab

Elio / Other Elio (voice)

Remy Edgerly

Glordon (voice)

Zoe Saldaña

Olga Solís (voice)

Brad Garrett

Lord Grigon (voice)

Brandon Moon

Ambassador Helix (voice)

Jameela Jamil

Ambassador Questa (voice)

Young Dylan

Bryce (voice)

Jake T. Getman

Caleb (voice)

Matthias Schweighöfer

Ambassador Tegmen (voice)

Ana de la Reguera

Ambassador Turais (voice)

Atsuko Okatsuka

Ambassador Naos (voice)

Shirley Henderson

Ooooo (voice)

Naomi Watanabe

Ambassador Auva (voice)

Brendan Hunt

Gunther Melmac (voice)

Anissa Borrego

Ambassador Mira (voice)