The 48 year-old actor made the decision during a virtual conversation with the Democratic Party candidate and his running mate, Kamala Harris.
In the video, which was shared on Johnson’s YouTube channel, Harris, 55, said she’s a “huge fan” of Johnson’s work, from Jumanji to the Fast and Furious franchise.
Johnson on his part revealed that his endorsement of Biden and Harris was a first in his life.
“I have been a lucky guy over the years, in my life and my career to have been part of and participated in some real defining moments, and I’ve never publicly endorsed a presidential candidate or vice presidential candidate in my life, over my career,” Johnson said before officially endorsing Biden, 77, and Harris.
“That means a great deal to us, for real,” the former vice president said, thanking Johnson for his support.
“You guys are both obviously experienced to lead. You’ve done great things. Joe, you’ve had such an incredible career. You’ve led in my opinion, with great compassion, and heart, and drive, but also soul.
“You and I talked about that in the past and how important soul is,” said Johnson, who was once the third-most backed person online to run for president in the 2020 election.
Dwayne Johnson also directed a question to Biden and Harris: “How will the both of you earn the respect of all the American people once you’re in the White House?”
Biden was the first to answer Johnson’s question, noting how he and Harris have to be honest with the public.
“By doing what we say we’re going to do. By keeping our word. By leveling with the American people. By taking responsibility. When we fail, acknowledge it.
“We’re not going to be perfect, but take responsibility. Say, ‘This is what I’m going to do, this is what I believe and tell the truth.’ That sounds so basic, but the American people are strong, they’re tough, they can take anything if you level with them, and tell the truth,” he said.
“And one of the ways we’re going to do it is to demonstrate we mean what we say. Our administration, DJ, is going to look like America. It’s going to be representative of all of America.”
Harris echoed Biden’s theme of honesty, telling Johnson: “As we know, the nature of trust is that, like Joe was saying and as you’ve said, it’s a reciprocal relationship. You give and you receive trust.
“And one of the foundations of trust is truth. You must speak truth but here’s the reality: truth can sometimes be really difficult to hear and for that reason sometimes people don’t speak it.
“But you cannot have trust if you don’t speak truth. You know that as a parent, we know that as parents, you have to speak truth. And as long as there is an understanding that it is being spoken not to confront, not to hurt, but to deal with things, the way they must be handled.
“That has to be part of the core of what we do as we go forward because to your point, we’re facing as a country so many challenges and people are grieving.
“I mean, people are grieving the loss of life, the loss of jobs, the loss of certainty, the loss of normalcy and to heal and get through this we’re gonna have to be honest about what healing will require.
“That’s one of the things that Joe and I really do have in common, which is we’re motivated by healing, but we know to do that, we have to be honest about what it’s going to take.”