A brief announcement on the Kremlin website revealed that President Vladimir Putin signed the citizenship grant on Thursday.
The former Oscar nominee and star of the movie "Green Card" has been vocal in his opposition to French President Francois Hollande's plans to raise the tax on earned income above
euro1 million ($1.33 million) to 75 percent from the current high of 41 percent.
"I have never killed anyone, I don't think I've been unworthy, I've paid euro145 million in taxes over 45 years," Depardieu wrote in an open letter in mid-December to Prime Minister Jean-Marc Ayrault, who had called the actor "pathetic."
"I will neither complain nor brag, but I refuse to be called 'pathetic," Depardieu wrote in his response.
A representative for the former Oscar nominee declined to say whether he had accepted the Russian offer and refused all comment. Thursday was a holiday in Russia and officials from the Federal Tax Service and Federal Migration Service could not be reached for comment on whether the decision would require Depardieu to have a residence in Russia.
Depardieu said in his letter to Ayrault that he would surrender his passport and French social security card. In October, the mayor of a small Belgian border town announced that Depardieu had bought a house and set up legal residence there, a move that was slammed by the newly-elected Socialist government.
Though the two-year tax was struck down by France's highest court Dec. 29, the government has promised to resubmit the law in a slightly different form soon. On Wednesday it estimated that the court decision to overturn the tax would cost it
euro210 million in 2013.
France's debt burden is around 90 percent of national income -- not far off levels that have caused problems elsewhere in the 17-country eurozone. In contrast to the proposed top French rate, Russia has a flat 13 percent tax on income.
Depardieu has made more than 150 films, among them the 1991 comedy "Green Card" about a man who enters into a marriage of convenience in order to get U.S. residency. Most famously, Depardieu was nominated for an Academy Award for his role as Cyrano de Bergerac in the 1990 film by the same name.
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The Kremlin statement gave no information on why Putin made the citizenship grant, but the Russian president expressed sympathy with the actor in December, days after Depardieu reportedly said he was considering Russian citizenship.
"As we say, artists are easily offended and therefore I understand the feelings of Mr. Depardieu," Putin said.
Although France and Russia disagree sharply about how to resolve the civil war in Syria, the two countries have strong commercial relations. In 2011, Russia signed a contract worth more than
euro1 billion ($1.33 billion) Friday to buy two French warships
-- the largest military deal between a NATO country and Moscow.
Depardieu is well known in Russia, where he appears in an ad for Sovietsky Bank's credit card and is prominently featured on the bank's home page.
Depardieu is not the only high-profile Frenchman to object to the super-tax. Bernard Arnault
-- chief of the luxury goods and fashion giant LVMH and worth an estimated $41 billion
-- has also said he would leave for Belgium.
France's Civil Code says one must have another nationality in order to give up French citizenship because it is forbidden to be stateless. Thursday's decision by the Kremlin appears to fulfill that requirement.
Press; By JIM HEINTZ and LORI HINNANT]
Hinnant contributed from Paris.
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