It is the first time the show, based on the songs of Abba, will be performed in the open air.
Playing 23 performances only with a strictly limited capacity, this will be part of a UK and international tour celebrating 22 years since Mamma Mia premiered in London in April 1999.
The show tells the irresistibly funny tale of a mother, a daughter and three possible dads on a Greek island idyll, all unfolding to the magic of Abba’s timeless songs.
The Harewood House date is the only chance to see the show outside of London in 2021.
Judy Craymer, Creator and Producer of Mamma Mia, said: ‘‘It’s going to be wonderful to experience the original musical literally under the stars in the beautiful grounds of Harewood House.
"Mamma Mia lends itself perfectly to the outdoors and what better way to leave lockdown than to be transported to our sunny Greek idyll.
"As we look forward to Mamma Mia’s return to the West End, we can’t wait for you to join us in the open air for the first time ever!”
The cast for Mamma Mia at Harewood House will include Sara Poyzer (Donna Sheridan), Nicky Swift (Rosie), Helen Anker (Tanya), Richard Standing (Sam Carmichael), Daniel Crowder (Harry Bright) and Jamie Kenna (Bill Austin). Further casting is to be announced.
To date, Mamma Mia has been seen by over 65 million people in 50 productions in 16 different languages.
In 2011 it became the first western musical ever to be staged in mandarin in the People’s Republic of China.
Mamma Mia became the eight longest running show in Broadway history, where it played a record-breaking run for 14 years.
When is it and how do I get tickets?
The Harewood House shows run from Friday, August 13 to Monday, August 30, starting at 8pm.
Tickets are on sale to the public from Friday, March 19 at 10am.
Tickets start at £39.50 and there are no booking fees.
Visit www.mamma-mia.com or call 0344 338 800 to book.
To sign-up for pre-sale tickets, on sale Tuesday, March, 16, visit www.mamma-mia.com/harewood-house