If Abrams wins, she would be the nation's first black female governor of a state.
Vice President Mike Pence has campaigned for Kemp at rallies in Augusta and Dalton, while President Trump is expected to support the candidate in Macon on Sunday. Oprah, who campaigned with Abrams in Marietta this week, was derided as a "magical negro".
"I don't want to run, okay?"
Winfrey, 64, endorsed Democrat Barack Obama before his 2008 White House run, and campaigned for the two-term president. Winfrey has since dismissed the notion that she would challenge Trump in 2020.
The cultural icon said she is a political independent who has "earned the right to think for myself and to vote for myself". "I'm not trying to test any waters, don't want to go in those waters". "I came for myself, and I approve this message".
"You get a vote!"
The Georgia Department of Economic Development said there were 320 films and TV shows shot in the state a year ago, generating an economic impact of $9.5 billion, including $2.7 billion in direct spending.
She's so passionate about her candidacy that she's made a decision to go door to door to canvassing for Abrams. "And I heard Will Ferrell was going door-to-door the other day", he said.
The ruling comes just four days before Tuesday's election for governor between Kemp, a Republican, and Stacey Abrams, a Democrat. He chided Republicans, including Kemp, for opposing the Affordable Care Act and only recently turning to ads that tell voters GOP candidates will protect insurance access for Americans with once-disqualifying health conditions.
And in a nod to the allegations of voter suppression that have marked the gubernatorial race, Winfrey told the crowd that "every single one of us has something that, if done in numbers too big to tamper with, can not be suppressed and can not be denied".