Frankie Valli Frankie Valli

Four Seasons singer Frankie Valli will "Walk Like a Man" right down the aisle on Hawaii Five-0 this season.

As we previously teased in Mega BuzzCarol Burnett will be returning to the show in Season 5 as Deb, the aunt of McGarrett (Alex O'Loughlin), and will be bringing a fiance with her, whom she met in chemotherapy. Valli, 80, has been tapped to play her beau, Leonard Campbell, has confirmed.  

Fall TV Preview: Get scoop on Hawaii Five-0 and more returning shows

"They're going to have this whirlwind romance, and they're coming to Hawaii to get married because they realize both of them don't have much time left," showrunner Peter Lenkov told last month.

Aunt Deb may be a little too eager to head down the aisle though, as McGarrett will have some suspicions about Leonard's past, according to Entertainment Weekly, which first reported the news.

The wedding episode will be the eighth of the season and is scheduled to air on Nov. 21, Lenkov tells

Hawaii Five-0 kicks off Season 5 on Friday, Sept. 26 at 9/8c on CBS. Are you looking forward to meeting Valli's character?

(Full disclosure: is owned by CBS.)

Watch This Tonight — See why House Hunters is our editors' pick: