Rajagopal was born in Kandramanickam, a small town in Sivagangai district.
[1][2] Rajagopal made his film debut in Pudhu Vazhvu which was produced and directed by M. K. Thyagaraja Bhagavathar.
As the film was delayed, Rajagopal acted in the Nalla Kaalam movie directed by K.Vembu in 1954.
Rajagopal was named after the success of the film with the title of Kula Deivam.
[citation needed] His sons Sampath and Selvam worked as a music composing duo.