Donald and Melania Trump among guests at Alina Habba’s 40th birthday bash at Mar-a-Lago

They were putting the party in GOP at Mar-a-Lago on Saturday night, we hear.

Donald and Melania Trump were among guests at a 40th birthday bash for his hard-charging legal eagle Alina Habba at the former president’s Palm Beach, Fla., private club, sources told Page Six.

Guests also included Eric and Lara Trump, as well as Don Jr. and Kimberly Guilfoyle, spies said.

Guilfoyle posted a pic posing with Habba and Lara with the caption, “Happy Birthday Alina!!”

The former fashion exec turned Trump civil attorney was in a glittering strapless jumpsuit, and was seen posing near an installation of Hermes gift bags that said, “Habba Nice 40th Birthday” in the luxury brand’s signature orange and brown color scheme.

An elaborate birthday cake depicted Habba sitting atop the White House in front of scales of justice and law books, along with a Birkin bag and a briefcase.

We hear that the indoor-outdoor fete on the club’s Lakeview Terrace, and inside a gold and white ballroom, featured a Beatles cover band as well as DJ Ross spinning tunes.

(No word yet if the Donald started playing musical selections late-night, as we’ve previously reported he is known to DJ at Mar-a-Lago on his iPad.)

Before the cake was served, we heard that the menu included tuna tartare, eggplant parmigiana, burrata, Habba’s favorite spaghetti Bolognese, potato-crusted salmon, Wagyu ribeye and grilled Branzino among other delicacies.

We previously reported that Habba had a smaller gathering in St. Barts of close friends last weekend — before she returned to Florida to tout Trump’s most recent legal win on Monday night on Fox News’ “Jesse Watters Primetime.” 

A state appeals court ruled this week that Trump could post a drastically reduced bond of $175 million in his civil fraud case.

Trump was back in Florida this weekend after paying respects to slain NYPD officer Jonathan Diller at Massapequa Funeral Home on Long Island on Thursday.

The former president had a busy week after shares in his media company, Trump Media & Technology Group, surged more than 50% at the start of trading on Tuesday.