Shahbaz took office after a successful vote of no confidence in the National Assembly, the lower house of parliament, on his predecessor, Imran Khan, on Sunday.
The 70-year-old cancer survivor was pivotal in the opposition effort to overthrow the Khan government.
Ahead of Monday’s vote, MPs from Khan’s PTI party collectively resigned and boycotted Sharif’s election.
The vote was held under tight security, with nearly all roads to the National Assembly closed.
The swearing-in ceremony is scheduled for later Monday.
Born on September 23, 1951 to a Punjabi-speaking Kashmiri family in the northeastern city of Lahore, the capital of Punjab, Shahbaz is known as a “strict administrator” who knows “statement” according to some analysts.