Former president Barack Obama has congratulated President-elect Joe Biden and Vice President-elect Kamala Harris on their election victory on Saturday.

"In this election, under circumstances never experienced, America turned out in numbers never seen. And once every vote is counted, President-Elect Biden and Vice President-Elect Harris will have won a historic and decisive victory," he said.

"I know he'll do the job with the best interests of every American at heart, whether or not he had their vote. So I encourage every American to give him a chance and lend him your support. The election results at every level show that the country remains deeply and bitterly divided. It will be up to not just Joe and Kamala, but each of us, to do our part — to reach out beyond our comfort zone, to listen to others, to lower the temperature and find some common ground from which to move forward, all of us remembering that we are one nation, under God."

Biden was Obama's vice president for both terms of his presidency and the two became close friends.

The former president recently joined the campaign trail to help get Biden elected.

Here is the full statement:

I could not be prouder to congratulate our next President, Joe Biden, and our next First Lady, Jill Biden.

I also couldn’t be prouder to congratulate Kamala Harris and Doug Emhoff for Kamala’s groundbreaking election as our next Vice President.

In this election, under circumstances never experienced, Americans turned out in numbers never seen. And once every vote is counted, President-Elect Biden and Vice President-Elect Harris will have won a historic and decisive victory.

We’re fortunate that Joe’s got what it takes to be President and already carries himself that way. Because when he walks into the White House in January, he’ll face a series of extraordinary challenges no incoming President ever has – a raging pandemic, an unequal economy and justice system, a democracy at risk, and a climate in peril.

I know he’ll do the job with the best interests of every American at heart, whether or not he had their vote. So I encourage every American to give him a chance and lend him your support. The election results at every level show that the country remains deeply and bitterly divided. It will be up to not just Joe and Kamala, but each of us, to do our part – to reach out beyond our comfort zone, to listen to others, to lower the temperature and find some common ground from which to move forward, all of us remembering that we are one nation, under God.

Finally, I want to thank everyone who worked, organized, and volunteered for the Biden campaign, every American who got involved in their own way, and everybody who voted for the first time. Your efforts made a difference. Enjoy this moment. Then stay engaged. I know it can be exhausting. But for this democracy to endure, it requires our active citizenship and sustained focus on the issues – not just in an election season, but all the days in between.

Our democracy needs all of us more than ever. And Michelle and I look forward to supporting our next President and First Lady however we can.