•
Steven Strait as Caleb Danvers, one of the four Sons of Ipswich. He attends Spenser Academy with the other Sons and is the oldest and most responsible and protective among the four. He is very cautious about using the Power due to its effect on his father and is the first to ascend. •
Sebastian Stan as Chase Collins, a new student at Spenser who befriends the Sons of Ipswich •
Laura Ramsey as Sarah Wenham, a new student at Spenser who transfers from a Boston public school, Caleb's love interest and Kate's friend •
Taylor Kitsch as Pogue Parry, one of the four Sons of Ipswich; the oldest after Caleb and his best friend. He is also Kate's boyfriend. •
Jessica Lucas as Kate Tunney, Sarah's roommate and Pogue's girlfriend •
Toby Hemingway as Reid Garwin, one of the four Sons of Ipswich and the most reckless and sassiest of the four, who often butts heads with Caleb •
Chace Crawford as Tyler Simms, one of the four Sons of Ipswich; the youngest of the four, who is the closest to Reid and usually takes his side •
Kyle Schmid as Aaron Abbot, a pompous student and jock •
Sarah Smyth as Kira Snider, a snobby student and Aaron's girlfriend •
Wendy Crewson as Evelyn Danvers, Caleb's alcoholic mother, who worries about her son Ascending and becoming like his father •
Stephen McHattie as William Danvers III, Caleb's father •
Kenneth Welsh as Provost Higgins, head of Spenser Academy •
Jon McLaren as Bordy Becklin ==Graphic novel==