Derek Anthony Klena is an American actor and singer. He is best known for his work on Broadway, including originating the roles of Nick Healy in Jagged Little Pill (2019–2021), Dmitry in Anastasia (2017–2018), and Michael in The Bridges of Madison County (2014). His breakthrough was in the original Off-Broadway production of Pasek & Paul's stage adaptation of Dogfight, and he played Fiyero in the 10th anniversary company of Wicked on Broadway. Klena most recently portrayed Christian in the Broadway company of Moulin Rouge! replacing Aaron Tveit in the role. He has made appearances on several television series such as Unbreakable Kimmy Schmidt, The Code, and Pretty Little Liars: Original Sin.

Jagged Little Pill is a jukebox musical with music by Alanis Morissette and Glen Ballard, lyrics by Morissette, and book by Diablo Cody, with additional music by Michael Farrell and Guy Sigsworth. The musical is inspired by the 1995 album of the same name by Morissette and deals with pain, healing, and empowerment. It premiered at the American Repertory Theater in Cambridge, Massachusetts, on May 5, 2018, directed by Diane Paulus.