Sharmila, who will not contest the elections this time, said she extended support to Congress to avoid a split of votes.
Sharmila met Congress top leaders Sonia Gandhi and Rahul Gandhi last month.
She had warned Telangana Chief Minister and Bharat Rashtra Samithi supremo K Chandrasekhar Rao of defeat in the upcoming polls.
Telangana will go to polls on November 30 and the results will be declared on December 3.