Tamsyn Roberts - Samantha's Mom (Age: 44)
played by Amy Adams
Sterling Roberts | Sam's Dad (Age: 49)
played by Ben Dahlhaus
Flynn "Finn" Roberts | Sam's Brother (Age: 26)
played by Gwilym Pugh
Julius Roberts | Sam's Brother (Age: 28)
David Lee | Grace's Father (Age: 50)
played by Jang Hyuk
Rachel Lee | Grace's Sister (Age: 23)
played by Byun Jungha
Dr. Ji-Won Lee | Grace's Mom (Age: 53)
played by Kim Hyun-joo
Peter Lee | Grace's Brother (Age: 11)
played by Cho Yi-An
Noam Lucas | Parker's Uncle (Age: 41)
played by Enrico Omri Ravenna