Analysts say Zuma brings a populist touch, ensuring a very different presidency to that of Thabo Mbeki.
 
Zuma was officially elected president by members of parliament on Wednesday, after the ANC won the general election two weeks ago.

He is due unveil his new cabinet on Sunday.

Jacob Zuma, 67, was sworn in before 5,000 invited guests - including former Presidents Nelson Mandela and Thabo Mbeki.

Zimbabwean President Robert Mugabe and Libyan leader Muammar Gaddafi were among nearly 30 heads of state and government attending.

Thousands of supporters watched the ceremony on TV screens from lawns below the Union Buildings, the president's office.

People began gathering in the capital before dawn, some singing songs in praise of their new president.

Many spoke of their excitement at being able to witness Jacob Zuma become president. "We are rejoicing. He's the people's leader," Nkompela Xolile told the BBC. "He knows the poor of this country."

Even a torrential downpour did not dampen spirits - in Zulu tradition, rain during an important event is a good sign.

The inauguration will be followed by a huge concert and several more concerts and parties planned throughout the day and evening.