Adam Tuominen was born one of three children to Christine and Lauri Tuominen. Him and his twin brother Sam have an older sister, Natalie. He is of Finnish and Lithuanian descent; his father was born in Finland. Tuominen attended St. Peter's College, Adelaide where he studied drama. Afterwards he went on to study drama and directing at Flinders University's Drama Centre. At Age 21, he graduated from the prestigious school National Institute of Dramatic Art in Sydney. He also studied martial arts for five years.