Accompanied by her son and Kadapa MP Y S Jagan Mohan Reddy, Vijayalakshmi visited her husbands grave, before filing the nomination as Congress candidate at Pulivendula Tahsildar office.
Pulivendula assembly seat was previously held by the late Chief Minister and therefore the bypolls was necessitated by the sudden death of YSR.
The election is scheduled to be held on Dec 19.
Telugu Desam Party (TDP), Bharatiya Janata Party (BJP), Praja Rajyam Party, Communist Party of India-Marxist(CPI-M) have announced that they would not contest to facilitate her unanimous election.
However, Lok Satta has revealed its desire to contest in the by-polls.