Mariah Carey’s ex-manager is suing infamous former Trump Russian pal Felix Sater for more than $1 million, alleging he hacked her computers and phones while they were dating and plotting “The Russian Sopranos” together last year.

Tough-talking Russian-American Stella Bulochnikov Stolper, who managed Carey for a number of years until late last year, is suing Sater in Brooklyn federal court. She alleges that she had bumped into Sater, a former childhood friend, in 2017 and had invited him to stay at her home in LA, with his assistant Kalsom Kam.

We’re told the pair began dating, and set up a TV production company together to start selling scripts to Hollywood, including a show about the Russian mob in America, dubbed “The Russian Sopranos.” Kam gave digital support to the company and the couple.

But now Bulochnikov alleges fellow Russian-American Sater — who partnered with the president on Trump Soho and tried to broker a deal in Moscow when POTUS was running for president — was manipulating her: “Sater sought to leverage [Bulochnikov] Stolper’s substantial connections in the entertainment industry, and requested that Stolper make introductions for him so that Sater could pitch media endeavors based upon his own turbulent life story.”

In late 2018, Bulochnikov Stolper — nicknamed “The Russian Dictator” in showbiz because of her fierce management style — became “frustrated” with Sater and threw him out of her house, court papers state. “Shortly thereafter, Stolper was shocked and devastated to learn that Sater and Kam had created unauthorized electronic methods of backdoor access to all of the data on her computers and digital devices, and were using those backdoors to access and misappropriate all of [Bulochnikov Stolper’s company] Wikked’s confidential, proprietary and valuable business files, as well as all of [her] separate business files and all of her personal files and photos relating to her and her family.”

She also claims, “Defendants used hacks, backdoors, and other nefarious electronic means to access Plaintiffs’ computers and smart devices, and misappropriated, copied and converted valuable, unauthorized information from Plaintiffs’ computers and smart devices, including but not limited to confidential client information, scripts, treatments, contracts, and other intellectual property.”

A separate source said Bulochnikov had given Sater’s assistant access to her digital devices while they were dating. But the couple split in 2018 and reached a settlement over their joint production company. Bulochnikov was due to start paying an agreed monthly settlement fee to Sater in relation to the company, when she filed this new lawsuit.

Sater – who strongly denies Bulochnikov’s claims – is a central figure in special prosecutor Robert Mueller’s investigation of President Donald Trump’s ties to Russia.

During the 2015-16 American presidential campaign, Sater worked with former Trump lawyer and fixer Michael Cohen to broker a deal to build a Trump Tower Moscow through his Russian contacts. He is scheduled to testify before the House Intelligence Committee on March 14.

Earlier, in 1998, Sater had pleaded guilty to his involvement in a $40 million stock fraud scheme orchestrated by the Russian Mafia and became an informant for the FBI and federal prosecutors, assisting with organized crime investigations. Then in 2017, Sater agreed to cooperate with investigators into international money laundering schemes.

Felix Sater said in a statement to Page Six, “This is a lame attempt by a former business partner and romantic interest to avoid paying her obligations to me under our confidential settlement agreement. There is absolutely no truth or substance in these farcical allegations.”

Bulochnikov — whose producing credits include Paris Hilton’s “My New BFF” and who also appeared on Carey’s reality show “Mariah’s World” — also didn’t comment. She had also sued Carey last year after the singer switched her management to Roc Nation, and the case was settled early this year.