A 'media seeking' Russian translator who attended President Trump's inaugural celebrations in Washington DC has been accused of being the source of an unverified dirty dossier about his links to the Kremlin.

Sergei Millian, who a Belarus-born businessman, allegedly told friends he was in Moscow in 2013.

Explosive claims he is accused of making include the allegation Russian officials had a video of him engaging in lewd, sexual acts with prostitutes in a Moscow hotel room and that there was a 'conspiracy of cooperation' between Trump and the Kremlin.

Millian's allegations were fed on to Christopher Steele, the British ex-MI6 spy who compiled the dossier, sources close to the report told The Wall Street Journal.

President Trump's lawyer Michael Cohen undermined his credibility and claims to have written to him to warn him to stop posing as an approved Trump associate.

'You too are seeking media attention off of this false narrative of a Trump-Russia alliance,' he said in an email to Millian where urged him to 'stop attempting to inject yourself into this crazy, Clinton campaign lie.'

Millian, 38, who lives in New York and works as a real estate broker, has in the past boasted that he and Trump enjoy a business friendship and that he served as an 'exclusive broker' for the Trump Organization in the sale of properties in Russia.

Sergei Millian, pictured with the president at Gulfstream Parl Race Track in Miami in 2014 (left) and at his inauguration (right) last week has been accused of being the source of the dirty dossier

The president's lawyer Michael Cohen insists no such friendship exists and that he has asked Millian to stop publicly representing himself an approved associate.

Millian refused to answer questions on the phone on Tuesday night, instead insisting that all correspondence be carried out over email.

None of DailyMail.com's questions were immediately answered by the man who describes himself as a specialist in 'representing foreign investors in the USA' for the Russian-American Chamber of Commerce, a company he set up to boost business relations between the two countries.

The 35-page dirty dossier was a damning report full of uncorroborated allegations about President Trump's apparent links to Russia and Vladimir Putin.

It was leaked after his November election victory and was originally commissioned as a dirt-finding mission by his political enemies.

The Trump administration has not yet addressed his ties to the dossier but in the past shot down his claims to have a business relationship with the president.

Millian has for years boasted in Russian media to have worked alongside the billionaire, once describing himself as the 'exclusive broker' for Trump apartments in the country.

He told Russian media outlets they first met in 2007 when President Trump attended the 'Millionaire Fair'.

Millian then visited the businessman in Florida, accepting his invitation to the Gulf Stream Race Track where he claims he 'asked about Russia'.

The pair posed with billionaire property developer Jorge M. Perez at the track and Millian later shared it online under the caption 'Troika' - a Russian word for three colleagues or associates.

They later met at Trump Tower, he claims, where he was introduced to Michael Cohen, the president's personal lawyer and the lawyer for Trump Organization.

Millian at President Trump's inaugural celebration last weekend in photographs he shared proudly on social media

President Trump (pictured in the Oval Office on Tuesday) has denied the dossier's allegations that he cavorted with prostitutes in a Moscow hotel room during a 2013 visit

Cohen denied ever meeting the boastful broker on Tuesday. 'I’ve never met the guy,' he told ABC.

'I have spoken to him twice. The first time, he was proposing to do something. He’s in real estate. I told him we have no interest. Second time he called me I asked him not to call me anymore.'

President Trump has repeatedly insisted that he has no business interests in Russia.

In social media photographs posted this week, Millian appeared at the Freedom Inaugural Ball, one of the events celebrating President Trump's inauguration.

Tickets to the ball were available to the general public online for $50. Thousands attended and watched as the newly sworn-in president danced with his first lady to My Way.

Millian previously boasted about helping the president market branded condos in Russia, shooting down his campaign claims not to have any vested interest in the country.

He previously appeared on Fox News to discuss Russia's relationship with the US

Millian's social media pages are littered with pro-Trump articles and photographs of him meeting prolific US politicians. He is seen above with Senator John McCain in 2014

Another of the real estate broker's photographs shows him posing with former president Jimmy Carter

'The level of business amounts to hundreds of millions of dollars -- what he received as a result of interaction with Russian businessmen,' he told ABC as part of an investigation into Trump's business presence in Russia.

He has also appeared on Fox News and Russian television networks to discuss America's relationship with the Kremlin.

Millian claims to have attended the Academy of Business Administration by the President of the Republic of Belarus and graduated from Minsk State Linguistic University with a degree in Foreign Languages and Diplomacy.

Millian, 38, lives in New York City. He would not answer questions about his ties to the dossier on Tuesday night

In 2005, he was appointed Director of the Russian American Federation, a charity which seeks to 'encourage interest in and understanding of Russian heritage among all communities in the US, as well as to promote reciprocal interest in and understanding of American heritage among global Russian-speaking communities.'

After traveling the world in his role to give speeches about Russian business, he moved to the US and began working as a real estate broker at the firm Nestseekers.

Among his listings were Grace Kelly's Upper East Side Townhouses, put on the market in 2013 for $48million.

Millian holds two leases in his name in New York City. One is a $2,000-a-month studio apartment in a doorman building on the Upper East Side close to Central Park.

The other is in Astoria, Queens, and is registered to his business, Millian Group Inc.

He also owns and operates Interchallenge Translation Services and is Vice President at thee World Chinese Merchants Union Association - a Beijing-based private company.

Millian's real estate company has offices in Atlanta, Georgia, and overseas in Belarus, Azerbaijan, Bulgaria, Bulgaria, China, Jordan and Russia.

President Trump has vociferously denied the unverified allegations in the dossier which was leaked after his November election victory.

Steele went into hiding after it was released and has not yet surfaced to address the scandal publicly.