Kimberly Guilfoyle, Donald Trump Jr.’s ex-fiancé, will kick off her diplomatic tenure with a nightclub party Sunday hosted by Greek pop idol Konstantinos Argiros, according to leaked plans obtained by the Daily Mail.

She’ll be jetting there by hitching a ride with billionaire and Vivid Seats co-founder Eric Vassilatos.

The event at Kentro Athinon, a downtown Athens dance club where fans traditionally throw flowers at performers, has raised concerns among those helping with her transition from MAGA starlet to the sage diplomat.

‘We look like the banana republic right now,’ a source familiar with the weekend plans told the Daily Mail. ‘You know Russia and China are looking at us like fools.’

The Nov. 2 event, scheduled for 9 p.m., asks attendees to RSVP to the U.S. Embassy in Athens.

The trio — who have been spotted partying together in London and Miami stoking speculation about their increasingly visible relationship — are evidently planning a whirlwind of glamorous events, from VIP parties at a club to sun–soaked yacht trips in the Aegean on Vassilatos’s yacht.

Guilfoyle’s friendship with Argiros first made headlines at a London charity gala for The Hellenic Initiative on Oct. 9, where she was pulled on stage to dance with the performer during his set.

The trio — who have been spotted partying together in London and Miami stoking speculation about their increasingly visible relationship — are evidently planning a whirlwind of glamorous events, from VIP parties at a club to sun–soaked yacht trips in the Aegean on Vassilatos’s yacht.

People close to Guilfoyle helping with her ambassadorial transition have privately expressed concern that her high-profile socializing with a CEO and Greek entertainer could undermine her credibility in the role.

Another source tells Daily Mail influential Greek–Americans are trying to play as ‘gatekeepers’ –– attempting to get close to the new ambassador.

‘They are trying to wiggle their way into her world since she is coming in fresh and naive with this level of status. Plus, she has an in with the president,’ a source close to Guilfoyle told Daily Mail. 

Greece’s new ambassador is scheduled to officially begin her duties next Tuesday after arriving in Athens –– when she will present her diplomatic credentials to Greek President Konstantinos Tasoulas.

Her debut engagement as ambassador is slated for November 6–7, when she will host a reception at the Zappeion in conjunction with the Transatlantic Energy Cooperation Forum. Among the reportedly expected attendees are US Energy Secretary Chris Wright and Greece’s Energy Minister Stavros Papastavrou.

Guilfoyle, the firebrand MAGA loyalist, initially lobbied to be the ambassador to the Vatican before settling for her comfy post in Greece, four sources familiar with the matter exclusively tell the Daily Mail.

Trump shut down the idea of the Vatican immediately, with one source describing it as ‘a non–starter.’

Greece, a sun–soaked vacation destination steeped in ancient history and democracy, situated across from Italy and hundreds of miles from the Vatican,was seen as a compromise.

Sources close to the president say Sergio Gor, former director of the White House Presidential Personnel Office and a close ally of Guilfoyle and Donald Trump Jr., pushed her for a diplomatic post.

Guilfoyle was not on the transition team’s final shortlist for Greece before Gor inserted her name as an alternative.

A diplomatic source told the Daily Mail, ‘It came out of left field. There was no way they were going to give her the Vatican. It wouldn’t be a fit, for many reasons.’

Guilfoyle’s public persona and background would likely have raised eyebrows among Vatican officials, making the appointment unconventional and controversial in such a sensitive setting.

Guilfoyle said she never pursued the Vatican and is ‘very excited to be the first female ambassador to Greece.’