The 26-year-old singer is currently in the country while Hiddleston starts filming Thor: Ragnarok, and on Tuesday, she took a solo trip to Lady Cliento Children's Hospital in South Brisbane. Swift surprised fans during a visit that was coordinated by Starlight Children's Foundation Australia.
"Thank you Taylor Swift for dropping by the Lady Cilento Children's Hospital this afternoon to give our patients and families a special surprise they'll never forget," the hospital posted on Facebook. "They'll never 'shake off' the memories you made tonight."
Swift posed for a few happy snaps with fans, looking adorable in a baby blue top.
"My eldest daughter has had her ultimate dream come true tonight & I can't say thank you enough for giving my kids the amazing experience tonight of meeting the beautiful Taylor Swift," one parent wrote.
Swift and 35-year-old Hiddleston have been keeping the romance alive in Australia after showing plenty of PDA during trips to Nashville, London, Rome, and Rhode Island. On Saturday, they went out for a romantic dinner at Gemelli, an Italian restaurant in Broadbeach, Queensland, on Australia's Gold Coast, holding hands.