Jayasudha, who was Congress MLA from Secunderabad here, joined TDP in the presence of Andhra Pradesh Chief Minister Chandrababu Naidu in Vijayawada.
Speaking to reporters, she said the credit for developing Hyderabad and making it an important centre for Information Technology goes to Naidu.
She recalled that she acted in several films opposite TDP founder N T Rama Rao as the female lead and that she had even campaigned for the party in late 1990s.
Jayasudha, a Congress MLA from Secunderabad in the previous united Andhra Pradesh Assembly, lost the 2014 polls.
A contemporary of another renowned actress Jayaprada, Jayasudha was a popular Telugu heroine in late 1970s and 1980s, acting with all top-ranking heroes, including NTR, Akkineni Nageswara Rao, Krishna, Sobhan Babu and Chiranjeevi.