The 21-year-old entertainer’s bro will be playing the role of Franz in the musical held at the Helen Hayes Theatre from November 10 through January 18.
“I’m so unbelievably excited,” Frankie told People. “I have wanted to play Franz ever since I first saw the show. I think it is one of the best, funniest, most clever roles.”
In case you didn’t know, Frankie performed in “Mamma Mia!” back in 2007 and was a contestant on Big Brother this past summer.
“huge congrats to my big brother @FrankieJGrande going back to Broadway. so so proud of u! u deserve it,” Ariana tweeted.