The "Ray Donovan" star argued that the former real-estate mogul is the "greatest president since Abraham Lincoln", and urged his fellow Republicans to support their leader, who he claimed hadn't put a foot wrong since taking office in 2016.
"People of the Republican party, I know you will agree with me when I say our president has our utmost respect and our love," Voight's first video, posted on Twitter, began.
"This job is not easy, for he's battling the left and their absurd words of destruction. I've said this once and I'll say this again: that our nation has been built on the solid ground from our forefathers, and there is a moral code of duty that has been passed on from President Lincoln."
The outspoken conservative defended Trump, and insisted that the controversial leader was doing his best for the American people.
"I'm here today to tell you the truth, and I'm here to tell you, my fellow Americans, our country is stronger, safer and with more jobs because our president has made his every move correct," he continued.
The 80-year-old concluded: "Don't be fooled by the political left, because we are the people of this nation that is witnessing triumph. So let us stand with our president, let us stand up for this truth: President Trump is the greatest president since Abraham Lincoln. God bless America. And may god continue to guide this nation. Much love."
Voight has shared video messages on Twitter defending Trump before, and frequently criticised former U.S. President Barack Obama.
And the "Deliverance" star's praise of Trump hasn't gone unnoticed. Back in March, the 72-year-old TV host-turned politician announced he was appointing Voight to the Board of Trustees at the John F. Kennedy Center for the Performing Arts.