Image source, Anthony PhanMusic correspondent
The singer, who is currently in the middle of a 30-show residency at New York's Madison Square Garden, is adding dates in Ireland, Spain, Italy, Germany and France - who all missed out on the tour's first leg this summer.
Every city will see a different support act, with 80s pop icons Tears For Fears playing at Wembley, and pop legend Kylie Minogue on the bill in Los Angeles.
Although Minogue is a festival headliner in Europe, these shows will represent her first ever stadium concerts in the US.
She celebrated the announcement on her Instagram stories, writing: "Together, together. Harry. Me. Can't wait to see you in April, LA."
Image source, Getty ImagesStyles will also play US stadiums for the first time as a solo artist - with dates booked in Phoenix, Dallas, Atlanta and Chicago.
After confusion and outcry over ticket prices for the 2026 shows, the singer's team have made the pricing structure clear for his upcoming dates, specifying that prices will range from $60 to $300 (£44 to £221).
The 2027 dates will also introduce "Unpredictable Fun Tickets," an initiative to make concerts more accessible to people on a limited income.
The programme will make a limited number of tickets available for £20 in the UK, $20 in the US and €20 in Europe. Details on availability and how to apply will be announced soon.
The cost of regular tickets will vary by city. , external
Image source, Getty Images"When we decided to do the 2026 tour I knew it would be special but what you turned it into was far beyond what I could have imagined," he wrote.
"I love playing music, I love being with all of you and being a part of the love and joy you all create together every night. That's why I wanted you to be the first to know we will be adding 2027 dates, which honestly, at first I found daunting.
"Being an artist is the only life I've ever known really, I have been doing this since I was 16 years old, and I feel like the luckiest person in the world to still be sharing these moments with you.
"Tomorrow's announcement will be the final cities of Together, Together," he continued.
"After that, I don't know what comes next for me, but I know that I'm excited to find out. "
Image source, Anthony Pham