His marriage with Real Housewives Of New York star Luann De Lesseps was just finalized.

And Tom D'Agostino celebrated his newfound freedom by enjoying a night out with his new love-interest.

The 50-year-old businessman was spotted heading to the iconic Chiltern Firehouse in London in the wee hours of Friday morning with girlfriend Anna Rothschild.

Moving on: Tom D'Agostino was spotted heading to the iconic Chiltern Firehouse in London in the wee hours of Friday morning with girlfriend Anna Rothschild

Not working out: His marriage with Real Housewives Of New York star Luann De Lesseps was just finalized

Of Tom's split with the reality star, a source told DailyMail.com exclusively: 'He is so relieved it is over. The whole thing was a huge mistake. He went to London to celebrate it being over.'

According to the insider, the former spouse of Luann jetted into London on Thursday as they will be enjoying each other's company while hitting the town together.

They also said that Anna is currently residing in Mayfair, London.

Date night: The 50-year-old businessman jetted to London on Thursday according to a source for Dailymail.com

Happy: A source told Dailymail.com exclusively: 'He is so relieved it is over. The whole thing was a huge mistake. He went to London to celebrate it being over'

What a gent: Tom touched on the back of Anna's arm as they walked together

Anna and Tom have been spotted spending plenty of time together in recent months as many had speculated that they were engaged.

However last month Anna cleared up the relationship a bit as she told DailyMail.com exclusively:

'Tom and I are not engaged at the moment.'

She went on to explain that the stunning 22 carat ring - thought to be worth about $2 million - that she recently started wearing is 'a gift.'

Beaming: Tom was all smiles on the outing

Across the pond: The insider also said that Anna is currently residing in Mayfair, London

Bonding time: Tom looked dapper in a navy suit

She did not elaborate on who had given it to her.

Rothschild told DailyMail.com that she and D'Agostino have been friends for 15 years and that she adores him.

'I would love to marry him because he's such a great guy, maybe one of the most amazing men I've ever met, but the timing isn't right for us at the moment,' she revealed.

The Manhattan socialite mixes in the same circles as the Real Housewives Of New York star Luann and is believed to have been friends with her at one time.

On the prowl: Anna rocked an all black outfit including long coat, mini dress, leggings, and strappy leather heels

Making moves: They hopped into a pick-up vehicle and enjoyed the rest of the night togetther

The two were photographed together at a holiday party back in 2010.

This comes after de Lesseps and the businessman settled out of court, according to records obtained byThe Blast on Wednesday.

The divorce came through on September 18, making The Countess a single woman once again after her short-lived second marriage.

The couple married on December 31, 2016, but announced their split just eight months later in August after Tom continued his flirtatious ways with other women.

She tweeted at the time: 'It’s with great sadness that Tom & I agreed to divorce. We care for each other very much, hope you respect our privacy during this sad time!'

Split! This comes after de Lesseps and the businessman settled out of court, according to records obtained by The Blast on Wednesday, as they are pictured together September 2016

Luann and Tom's relationship was featured on RHONY over the course of several seasons.

They were on and off so frequently that fellow Housewife Bethenny Frankel even pleaded with LuAnn not to tie the knot with Tom before their wedding.

The reality star famously had to give up her Countess title to marry Tom.

The reality star is getting over her broken heart by volunteering for the Red Cross in the Florida Keys, devastated by Hurricane Irma last month.

Speaking to People on Wednesday, Luann said she had just heard the news about her divorce.

'It’s what we both decided upon in the end, and even though we decided that, it’s sad,' she said.

New York gals; Rothschild and de Lesseps move in the same circles in Manhattan and are thought to have been friends at one time. They're pictured at a holiday party in December 2010

'It’s an end to something that was so, so incredible. And I I’ve got a lot of emotions. I don’t even know what to say.

'I mean, it’s sad. It’s sad for me, but I’m putting myself to work, keeping myself busy, and trying to move past it and move on to the next chapter of my life.'

LuAnn's first husband was Count Alexandre de Lesseps, 68, with whom she shares son Noel, 21, and daughter Victoria, 22.

They divorced in 2009 after 16 years of marriage following his alleged affair with Ethiopian Princess Kemeria Abajobir Abajifar.