Debby Weaver (portrayed by Jami Gertz) is the mother of the Weaver family. Despite first impressions, she learned to accept her alien neighbors. She married Marty many years ago after they met at their high school's prom.
Marty Weaver (portrayed by Lenny Venito) is the father of the Weaver family. Marty learns to befriend the Bird-Joyner-Kersees, particularly Larry, despite his strong distrust for the family at first. He is known for being lazy and was in a rock band throughout high school.
Amber Weaver (portrayed by Clara Mamet) is the oldest daughter of the Weaver family. She has a generally pessimistic, sarcastic attitude towards everything. For the majority of season 2, she dates Reggie Jackson, the first son of Larry and Jackie.
Max Weaver (portrayed by Max Charles) is the middle child of the Weaver family. Though he is not very intelligent, he sometimes has unexpected good fortune fall in his favor, including qualifying for his school's spelling bee by spelling his last name.
Abby Weaver (portrayed by Isabella Cramp) is the youngest child of the Weaver family. She is known for being sassy towards her brother. Abby is one of the few members of the family who is able to talk to Amber without fear.
Larry Bird (portrayed by Simon Templeman) is the orderly but neurotic father of the Bird-Joyner-Kersee family and the leader of the alien community. He strongly attempts to fit in on Earth, often by learning about new holidays, television programs, or other cultural phenomena. His ultimate goal is to rise to some position of power such as one of the Sharks on Shark Tank. He takes his name from basketball star Larry Bird.
Jackie Joyner-Kersee (portrayed by Toks Olagundoye) is the generally upbeat mother of the Bird-Joyner-Kersee family. She, like her husband, often attempts to fit in on Earth and frequently points out the differences between Earth and the aliens' home world of Zabvronia. She takes her name from Jackie Joyner-Kersee, an American Olympiantrack and field star.
Reggie Jackson (portrayed by Tim Jo) is the well-meaning older son of the Bird-Joyner-Kersee family. Though he shows romantic interest in Amber, he breaks up with her midway through the second season due to his Zabvronian "soulmate," Jane. His name comes from Reggie Jackson, an American baseball player.
Dick Beef Butkus (portrayed by Ian Patrick) is the younger son of the Bird-Joyner-Kersee family. He has unique and odd behavior and, at a certain point during the first season, experiences a strong love for a toaster. His name was taken from professional football player Dick Butkus.