Hichilema, 59, will take the oath of office before a crowd that will notably include opposition politicians from regional countries as well as current and former African leaders.
On his sixth bid for the presidency, Hichilema defeated the incumbent Edgar Lungu, 64, by almost one million votes -- a landslide spurred by economic hardship and restricted freedoms under the previous regime.
The victory is the 17th opposition win in sub-Saharan Africa since 2015.
