The couple, who were visiting London this week, were due to fly back to their home in the United States today, Wednesday, but decided at the last minute to hop across the pond to the Emerald Isle.
Taking to her Instagram stories, Mary said: “Ok so we changed our plans. We were supposed to be leaving tomorrow but we decided to come to Dublin. Ireland – we’re coming to you tomorrow.”
Romain asked fans for some recommendations: “Let us know what’s best to do. Obviously I want to check out the Guinness factory. Let us know what to do, when to do [it], and where to go eat some good food.”
During their time in the UK, the pair appeared on ITV chat show Lorraine to discuss the four seasons of their hit reality show.
Mary and Romain also presented the host, Lorraine Kelly, with a bottle of Champagne to celebrate her birthday.
The couple discussed their plans to start a family: “We are too busy right now to try to do it now, but when we get back to the states we are going to start freezing our embryos,” Mary said.
“It's just not the right timing, we’re focused on our careers, and I’m 41 now so we have to start thinking about that.”
They went on to enjoy a fun day in the city visiting Winter Wonderland and shopping at luxury brand Guess and a jewellery store. They finished off their day with dinner at STK Steakhouse, near King's College London.
The couple’s wedding was filmed for the second series of the Netflix show, and they tied the knot in the season finale.
The programme follows estate agents at the elite Oppenheim Group as they sell homes to the rich and glamorous in Los Angeles.
With a name like Mary Fitzgerald you may be wondering if the 41-year-old is of Irish heritage.
Speaking to FM104 last year, the realtor revealed that she is “sick” of people asking about her surname.
“I am sick of it because it was my previous married name so I never want to talk about it".
"So yeah, it was my previous name and people just knew me as that when I moved back and it was such a hassle to change it because I had all my real estate stuff".
The blonde beauty has been married three times. Her first husband passed away, and the relationship with her second husband didn’t work out.
Notoriously private, the reality star has not revealed much information about her exes, only sharing why she is no longer with them.