TEHRAN, Aug. 18 (Xinhua) -- Iranian President Hassan Rouhani on Saturday congratulated Imran Khan on his election as Pakistan's new prime minister, state TV reported.

In his message, Rouhani said that the Islamic republic of Iran is ready to expand cooperation with Pakistan, expressing hope that the two countries would further improve relations during Khan's tenure.

Former cricket star Imran Khan was sworn in as Pakistan's new prime minister on Saturday.