Six ministers and three advisors resigned after the no-confidence motion was submitted against "prime minister" Chaudhry Abdul Majeed by Pakistan People's Party legislators Mohammad Hussain and Majid Khan.
Majeed, who also belongs to the PPP, is a nominee of President Asif Ali Zardari.
The ministers and advisors who resigned belong to the PPP but sources said they would vote in favour of the no-confidence motion.
Majeed was sworn-in in 2011.