Former New York City Mayor Rudy Giuliani is seen outside his apartment building after his law license was suspended in Manhattan in New York City, New York, U.S., June 24, 2021.
Former New York City Mayor Rudy Giuliani is seen outside his apartment building after his law license was suspended in Manhattan in New York City, New York, U.S., June 24, 2021. Reuters / ANDREW KELLY

Rudy Giuliani, who previously served as Donald Trump's personal lawyer, has been ordered by a judge to testify in August as a witness before a Georgia special grand jury probing the former president's alleged attempts to overturn the 2020 election results.

"It is hereby ordered that Rudolph William Louis Giuliani appear and testify" before the grand jury in the state Superior Court of Georgia in Fulton County beginning on Aug. 9, the order filed on Wednesday said after Giuliani, who tried to block the subpoena, failed to appear at a hearing in New York.

This month, the special grand jury in Georgia issued subpoenas to Senator Lindsey Graham and members of Trump's former legal team, including Giuliani, a former New York City mayor.

The probe was launched after Trump was recorded in a Jan. 2, 2021, phone call pressuring Georgia's secretary of state to overturn the state's election results based on unfounded claims of voter fraud. Giuliani, who was not immediately available for comment, spearheaded legal efforts by Trump to overturn the electoral results in multiple swing states, including Georgia, that were won by President Joe Biden.

In the call, Trump urged Secretary of State Brad Raffensperger, a fellow Republican, to "find" enough votes to overturn his Georgia loss to Democrat Biden.

The transcript quotes Trump telling Raffensperger: "I just want to find 11,780 votes" -- the number Trump needed to win Georgia.

Trump has denied wrongdoing in the phone call. In January, Fulton County District Attorney Fani Willis requested the grand jury, saying its subpoena power was needed to compel witness testimony.

Legal experts have said Trump's phone calls may have violated at least three state election laws: conspiracy to commit election fraud, criminal solicitation to commit election fraud and intentional interference with performance of election duties.