The accident, in which at least 124 people were injured, occurred in the southern state of Tamil Nadu. According to reports on Saturday, several children were also among the dead.
Tens of thousands of people had gathered in the Karur district on Saturday, in sweltering heat, to attend the meeting with Joseph Vijay Chandrasekhar, known by the artist name Vijay.
Vijay is one of Tamil Nadu's most successful actors and is running in the state election to be held early next year.
In southern India, and especially in Tamil Nadu, some film stars have hero status and several have become successful politicians.
