Daughter of an Irish immigrant Kimberly Guilfoyle has gone Instagram official with the First Son.

It’s official! Fox presenter Kimberly Guilfoyle, who spent most of her summers growing up in Ireland, is dating the First Son Donald Trump Jr. The couple has been the subject of many rumors since May but a trip to Montana saw them go Instagram official with matching hunting and fishing posts. Guilfoyle even donned a Trump hat for the occasion.

Trump and Guilfoyle were in Montana as Trump was to speak at the state's Republican convention in support of Senate candidate Matt Rosendale. Don Jr confirmed the romance on stage, where he gave a shout out to his new other half.

"Just as everyone else thanks their significant others, I got to thank Kimberly for coming out here. We're going to take her fishing tomorrow, then shooting," he told the crowd, according to Vanity Fair.

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"This is a miniature test to see if she really likes it, or if she's going to pretend to like it, but either way we're going to have a good time — or at least I will."

Twice divorced Guilfoyle has been linked to Don Jr. for several weeks, following on from the eldest First Son’s split from his wife in March 2018. While the pair was spotted together following President Trump’s State of the Union address in January 2018, which Guilfoyle was covering for Fox, the relationship is believed to have started after Don’s estranged wife Vanessa filed for divorce. Since the split, it has been revealed that Don Jr had an affair with Aubrey O’Day.

He and Vanessa split this year after 13 years of marriage. The couple has five children together; Kai (10), Donald III (9), Tristan (7), Spencer (5) and Chloe (3).

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Guilfoyle also has an 11-year-old son named Ronan from her second marriage to Eric Villency, the CEO of a design firm. She was first married to Gavin Newsom, a Democrat and California’s Lieutenant Governor.

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Her father Tony Guilfoyle immigrated to the US from Ennis, Co. Clare in his 20s and Guilfoyle returned there every summer, working in her family’s local store, and even staying in Ireland to study law in Trinity College Dublin. Before joining Fox in 2006, Guilfoyle worked as a prosecutor in San Francisco, then as deputy district attorney in Los Angeles.

“I grew up partly in Ireland,” Guilfoyle said.

“Every summer from the age of five, I lived in Ennis where my Guilfoyle relatives had businesses on O’Connell Street — a gift shop called Dalcassian House, and Dalcassian Printers. I worked in the shop, which sold lovely china and Waterford Crystal.

“I was about 11 or 12 and I got about IR£10 a week. It instilled a sense of responsibility in me, putting in the hours and earning the money.

“My late father Anthony Guilfoyle left Ireland in his twenties and went to work in America. He worked in construction in San Francisco and later became a contractor and political adviser. He was drafted into the US Army and stationed in West Germany. My mother, Mercedes, was a special needs teacher who died when I was a child. My parents worked hard to ensure we had a better life. They supported us and gave us the courage to pursue our dreams. I appreciate that greatly. My father was so proud of my achievements.”

Kimberly Guilfoyle and Donald Trump Jr. Instagram