The 37-year-old lawyer by training became the star of the street protests that erupted in Moscow more than a year ago by orating some of the most fervent speeches against President Vladimir Putin's 13-year-rule.
He drew ever-larger crowds through charisma and simple slogans that branded the ruling elite as "the party of crooks and thieves" -- a phrase that has since been debated on Kremlin-controlled television.
His nomination for mayor came late yesterday at a meeting of the RPR-Parnas party -- a tiny group that includes former prime minister Mikhail Kasyanov.
"Alaxei Navalny has officially been nominated for Moscow mayor," his spokeswoman Anna Veduta tweeted.
Also Read
"Navalny is a candidate for Moscow mayor," tweeted fellow protest leader Ilya Yashin.
"A total of 88 Parnas activists voted in favour of the candidacy. There were eight against," he said.
Some 110 of these have to come from the 1,810 deputies serving various functions in Moscow district governments.
But Navalny's job is complicated to a much greater extend by a series of criminal hearings that have been launched against him in recent months.
Their total has reached about half a dozen and Nalanvy himself has jokingly said that he has lost of how many years in jail he may potentially face.
The most serious -- and the one on trial now -- involves the alleged theft of a piece of forest that belonged to a regional Russian administration where Navalny once served as an informal adviser.
Navalny faces up to 10 years in jail if convicted in that case.