Wikimedia Commons/Octet musical film Movie Lin-Manuel Miranda directs an all-star cast including Amanda Seyfried, Rachel Zegler & Hamilton alumni in the Octet film adaptation. April 22, 2026 AceShowbiz - Octet fans have a lot to be excited about as the cast for the upcoming film adaptation has been revealed. Directed by Lin-Manuel Miranda, this new project brings together a remarkable ensemble of performers from acclaimed musical films and television series. Leading the cast is Amanda Seyfried, known for her role in The Testament of Ann Lee, who will portray Jessica.