Adult film actress Stormy Daniels, one of the star witnesses for the prosecution, is "relieved" the case is over, her attorney Clark Brewster said in a statement.

"No man is above the law, and the selfless hardworking service of each of these jurors should be respected and appreciated," Brewster said.

Daniels, whose hush money payment was at the center of the case, provided some of the most gripping testimony of the trial, describing in detail her alleged 2006 sexual encounter with Donald Trump, which he denies.

The prosecution's star witness, former Trump attorney Michael Cohen, called today's verdict "an important day for accountability and the rule of law."

"While it has been a difficult journey for me and my family, the truth always matters," he said.

3:49

Michael Cohen reacts to Trump guilty verdict

Donald Trump's former lawyer and fixer Michael Cohen released a statement saying, "Today is an important day for accountability and the rule of law."

Two senior Trump advisers who ABC News spoke with were extremely angry after the verdict.

Both said they were not surprised by the jury’s decision. One said, "The fix was always in," and the other added, "Not surprised -- it’s New York."

Donald Trump Jr., reacting to his father's guilty verdict, said, "The Democrats have succeeded in their yearslong attempt to turn America into a third-world s---hole. Nov. 5 is our last chance to save it."

The guilty verdict shows "no one is above the law," a representative for President Joe Biden's campaign said, adding, "But today's verdict does not change the fact that the American people face a simple reality. There is still only one way to keep Donald Trump out of the Oval Office: at the ballot box."

"Convicted felon or not, Trump will be the Republican nominee for president," Michael Tyler, communications director for the Biden-Harris campaign, said in a statement.

"A second Trump term means chaos, ripping away Americans' freedoms and fomenting political violence -- and the American people will reject it this November," Tyler said.

4:06

Biden campaign reacts to Trump guilty verdict in hush money case

President Joe Biden's campaign released a statement after former President Donald Trump was found guilty on all counts in his hush money trial, urging supporters to vote in November.

The White House offered a very brief comment, with a White House Counsel’s Office spokesperson saying, "We respect the rule of law, and have no additional comment."

Among the congressional response, Speaker of the House Mike Johnson, who traveled to Manhattan days ago to support Trump at the trial, said in a statement, "Today is a shameful day in American history. Democrats cheered as they convicted the leader of the opposing party on ridiculous charges, predicated on the testimony of a disbarred, convicted felon."

"President Trump will rightfully appeal this absurd verdict -- and he WILL WIN!" Johnson said.