•
Mohanlal as
Nettoor Stephen (Nettooran): Mohanlal plays the title character of Nettooran, a Communist Party activist turned wealthy industrialist. Nettooran marries Annakkutti, who is the only daughter Medayil Ittichan, an elite Christian landlord. •
Murali as
D.K. Antony: Murali portrays Sakhavu (Comrade) D.K. Antony, Nettooran's close friend and confidante, who is the son of a lawyer, but becomes a Communist Party activist alongside Nettooran and Sethulakshmi. He later becomes the industries minister in the state legislative assembly, in the first elected Communist government. He is married to Sethulakshmi, but has a child in his one-night relationship with Stella. •
Geetha as
Sethulakshmi: Geetha plays Sakhavu Sethulakshmi, an early day party activist, who, along with Nettooran and D.K, formed the most powerful trinity among party activists. She falls in love with and marries D.K., and later becomes the Home Minister of the State. •
Urvashi as Annakkutty: Annakkutty is Nettooran's wife. She elopes with Nettooran from her well off family against their wish. •
Rekha as Stella: Stella is tragic character, who has an illegitimate child from her brief relationship with Sakhavu D.K. •
Madhu as Medayil Ittichan: Veteran actor Madhu portrays Ittichan, a rich landlord, under whom Nettooran was employed, running his press. Ittichan disowns his daughter Annakkutty, evidently not wholeheartedly, when she elopes with Nettooran. •
Jagathy Sreekumar as Unnithan: Unnithan is a trusty assistant to Nettooran, and was a Party activist along with Nettooran and D.K. in the early days. •
Nedumudi Venu as Father Felix: Father Felix is the priest in charge of the congregation to which the Medayil family belongs to. He marries Annakkutty and Nettooran, ignoring protests from his flock. •
Karamana Janardanan Nair as
Janardanan Potty: Potty is a senior Party leader, who goes on to become the Chief Minister of the first Communist government of Kerala. •
Lalu Alex as Medayil Avaran Kutty: Avaran Kutty is Annakkutty's short tempered older brother, who despises Nettooran, whose relationship with his sister he opposed vehemently. •
Janardhanan as Kannan Muthalali: Kannan Muthalali is a shrewd businessman who pretends to be a well-wisher of the Party, expecting business returns. •
Vineeth as Medayil Josekutty •
Vijayaraghavan as Medayil Kariyakutty •
Thikkurissy Sukumaran Nair as Thirumulpad •
Zainuddin as Ayyappan Thampi •
Ashokan as Madhavan, a minor antagonist who dislikes Nettooran •
K. P. A. C. Sunny •
Sukumari as Chettathi •
Kuthiravattam Pappu as Noor •
Rajan P. Dev as Idiyan Karthavu • Nimmi Paul == Music ==