Who is PK Rosy, celebrated by Google today but forced to leave Kerala in her time?

Google on Friday celebrated PK Rosy, the first woman lead in Malayalam cinema. She was born in 1903 in a Dalit family, who were grass cutters. She learned traditional Kakkarissi Natakam and in 1928 appeared in JC Daniel's film Vigathakumaran. Rosy played a Nair woman which angered the upper-caste community, and she was forced to leave film industry and Kerala.