Milo Ventimiglia : Peter Petrelli
Hayden Panettiere : Claire Bennet
Jack Coleman : Noah Bennet
Masi Oka : Hiro Nakamura
Adrian Pasdar : Nathan Petrelli
Ali Larter : Niki Sanders / Tracy Strauss
Sendhil Ramamurthy : Mohinder Suresh
Greg Grunberg : Matt Parkman
Zachary Quinto : Gabriel 'Sylar' Gray
James Kyson Lee : Ando Masahashi
Cristine Rose : Angela Petrelli
Santiago Cabrera : Isaac Mendez
Tawny Cypress : Simone Deveaux
Leonard Roberts : D.L. Hawkins
Noah Gray-Cabey : Micah Sanders
Dana Davis : Monica Dawson
David Anders : Adam Monroe
Dania Ramirez : Maya Herrera
Kristen Bell : Elle Bishop
Robert Knepper : Samuel Sullivan