According to an Executive Mansion release, President Sirleaf, early on Tuesday, October 10, 2017 joined the queue at precisely 8:20a.m.in Fefeh Town, Bomi County to cast her vote.
Sirleaf has been the President of Liberia since 2006 following 14 years of a deadly civil war during the reign of the now incarcerated former President Charles Taylor, who was ousted by rebels in 2003.
He added: "We are calling on NEC to immediately halt further announcements of election results". That year, he reached the run-off but lost to the current president Ellen Johnson Sirleaf.
In Liberia, a candidate needs more than 50% of the votes for outright victory in an election, with experts forecasting it is likely to go to a second round.
"I would like to congratulate one of my former players, who became president of Liberia, George Weah". The NEC hasn't yet declared how numerous 2.2 million registered voters took part in the polls.More news: Amazon introduces option for teens to shop on their parents' accounts
Worldwide observers in the West African nation said the vote went smoothly despite late starts in some counties.
Tuesday's election will mark the first time in 73 years that a democratically-elected president will peacefully hand over power to a successor chosen by Liberian voters.
Vice-President Joseph Boakai and footballer George Weah are seen as the frontrunners to succeed the Nobel Peace Prize victor Ellen Johnson Sirleaf who led the country's recovery from Ebola and civil war.
"The future of the country is in your hands, no one is entitled to your vote, not because of party, ethnicity, religion or tribal affiliation", Sirleaf, a co-winner of the 2011 Nobel Peace Prize, said in a speech on Monday. Final results should be known within two weeks. People everywhere tell him they want to see change.