Muhammad Raza and Waheed-uz-Zaman announced their joining at a press conference here at the residence of PSP Chief Syed Mustafa Kamal.
Anees Qaimkhani and Raza Haroon were also present.
They said they were attracted by the PSP programme of national unity and harmony, for the prosperity of the country.
PSP Chief Syed Mustafa Kamal appealed to Urdu speaking community especially the youth to join his party in their interest and of the country as a whole.