Taylor Swift and Calvin Harris visit one of the country's top attractions
Calvin Harris took Taylor Swift to the Guinness factory following her sold-out shows in the 3Arena.
The 31-year-old DJ and 25-year-old singer - who were recently announced as the world's highest paid celebrity couple - were spotted taking a tour around the tourist attraction learning how the Black Stuff is made, following Taylor's concert in Dublin.
Speaking to The Sun newspaper, a source said: "Taylor loves an impromptu trip, especially in a city she's not overly familiar with. They managed to keep themselves low profile so they weren't bothered by fans.
"They looked to be really enjoying themselves surrounded by all that alcohol."
The power pair, who both earned €140m in the last year alone, held the official afterparty at the Guinness Storehouse last night although they were surprise guests, according to reports.
Along with an army of Taylor's dancers and crew, the duo hosted the bash which reportedly lasted until 5am this morning after two successful shows.
#Talvin were staying at the InterContinental Hotel, formerly known as the Four Seasons, in Ballsbridge and are jetting out of Ireland this morning as Taylor continues her 1989 world tour.
Taylor and Calvin have been able to see a lot of each other this week, as they enjoyed a double date with her ex boyfriend Joe Jonas on Sunday.
The 'Shake It Off' hitmaker and 'Feel So Close' producer were joined by Joe, 25 and his rumoured girlfriend, 20-year-old model Gigi Hadid, for a boat trip on the River Thames in London.
As if there wasn't enough potential awkwardness, model Karlie Kloss, 22, who was romantically linked to Joe in 2011, was also on board.
Despite the past, the quintet appeared to be having a great time as they enjoyed a luxury charter around London and Taylor posted a picture on her social media pages.
The snap shows her cuddling up to Calvin as all five smile for the camera and she captioned it: "Little known fact: Karlie is secretly an unofficial historian/London tour guide. Kind of."