Mujtaba Gilani and four other candidates submitted their candidature documents for contesting by-elections for PP-206 on Friday.
Mujtaba Gilani is the brother of Prime Minister Yousaf Raza Gilani.
Gilani was given a ticket by the PPP for this consituency in a meeting of the PPP's central executive council earlier.
PP-206 in Jalalpur Peer Wala was vacated when Naghma Mushtaq Lang resigned from the seat.
With a total of 160,000 registered voters in the constituency, the by-polls will be held on June 5.
112 polling stations and 327 polling booths will be set up for the purpose.