Imran Khan, who is also the Chairman of the ruling Pakistan Tehreek-e-Insaf party (PTI), made the announcement on Saturday, Xinhua news agency reported.
Pakistan will hold the presidential election on September 4 to have a successor to current President Mamnoon Hussain at the end of his five-year-tenure.
Pakistan's President is elected by the members of the National Assembly or the lower house of Pakistan's Parliament, senate and the four provincial assemblies.
Arif Alvi, a senior politician and currently a member of the National Assembly, is considered as a close confidant of Imran Khan.
He is a founding member of PTI and was the Secretary-General of the party from 2006 till 2013.
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