Speaking to reporters at Proddatur, he said he would meet the TDP president N Chandrababu Naidu in three days and join the party.
"I am not aspiring for any ticket (to contest the upcoming elections) or post. I decided to switch over to TDP to defeat the YSR Congress Party," he said.
Reddy claimed that only Naidu can develop residual Andhra Pradesh.
"For the development of the state, I am joining TDP," he added.