REESE WITHERSPOON

Oscar-winning actor Witherspoon described it as a "monumental day" and welcomed Kamala Harris becoming the first vice president of the United States.

"No matter what side you are on, let's take a moment to recognise how far women have come in this country," she said on social media.

"Thinking about all those who shattered glass ceilings and paved the way for a woman to * finally * be Vice President of the United States makes me so emotional.

"Sojourner Truth. Harriet Tubman. Shirley Chisholm. Ruth Bader Ginsburg. Kamala Harris. I salute them all. And to the young girls of our nation... DREAM BIG. Anything is possible."

LADY GAGA

An emotional Lady Gaga, who had campaigned for Biden and Harris, wiped away tears in a video message posted on Instagram.

"I hope that all the women know in this country there is a real, real reckoning, a real change. And I hope the people whose voices, who have been oppressed by power, I hope that you know your voices were heard."

Gaga added: "I am honestly kind of speechless. This is a very special day. A day where a lot of people who have felt we were living in a state of terror and aggression all the time, but it's over. You can feel warm now."

ARIANA GRANDE

Grande posted a picture of Biden and Harris, writing in the caption: "!!!!!!!!!"

JULIA ROBERTS

Oscar-winner Julia Roberts shared a picture of US TV news presenter Steve Kornacki, who went viral online for his election coverage.

ALEC BALDWIN

Baldwin won acclaim for his portrayal of Trump on comedy sketch show Saturday Night Live.

Alongside a screenshot of TV news declaring Biden the winner, he wrote: "Amen..."

Australian Associated Press