Photo Flash: Sneak Peek - Margo Seibert and Andy Karl in Rehearsal for ROCKY!

ROCKY just revealed on its official Twitter page a behind-the-scenes look at rehearsals for the show's Broadway debut. Scroll down for a photo of Margo Seibert and Andy Karl onstage!

ROCKY brings to life the iconic and inspiring story of struggling small time Philly boxer, Rocky Balboa, who gets a once-in-a-lifetime shot to go the distance against heavyweight champ Apollo Creed. Both an adrenaline-infused spectacle and a surprising story of blossoming romance between two lonely outsiders, Rocky is a heart-stopping and viscerally theatrical new musical for everyone brave enough to follow their dream.

ROCKY features an original score by Stephen Flaherty and Lynn Ahrens, the celebrated Tony Award-winning and Academy Award-nominated songwriters behind Ragtime, Once on This Island, and Anastasia, and a book by multiple Tony Award-winner Thomas Meehan (The Producers, Hairspray, Annie) and Sylvester Stallone, who was nominated for an Academy Award for Best Original Screenplay for the 1976 Oscar-winning Best Picture, Rocky.

The production is directed by Alex Timbers, the Tony-nominated director behind the acclaimed musicals Here Lies Loveand Bloody, Bloody Andrew Jackson, as well as Peter and the Starcatcher, which continues to run off-Broadway. The musical features choreography by Steven Hoggett, who received a Tony Award nomination for his work on Once and Kelly Devine, best known for the long-running Broadway hit Rock of Ages.

The Rocky cast features Andy Karl (Rocky), Margo Seibert (Adrian), Terence Archie (Apollo Creed), Dakin Matthews(Mickey) Danny Mastrogiorgio (Paulie), Jennifer Mudge (Gloria) and ensemble members Adrian Alfredo Aguilar, Eric Anderson, Michelle Aravena, JAmes Brown III, Sam J. Cahn, Vincent Corazza, Kevin Del Aguila, Ned Eisenberg,Bradley Gibson, Stacey Todd Holt, Sasha Hutchings, David Andrew Macdonald, Vasthy Mompoint, Vince Oddo,Okieriete Onaodowan, Adam Perry, Kristin Piro, Luis Salgado, John Schiappa, Samantha Shafer, Wallace Smith,Jenny Lee Stern, Dan'yelle Williamson and Mark Zimmerman.

ROCKY features set design by Chris Barreca (Marie Christine), costume design by Tony nominee David Zinn (Picnic, Other Desert Cities), lighting design by Tony Award-winner Christopher Akerlind(Light in the Piazza), sound design by Tony nominee Peter Hylenski (Motown, Rock of Ages), orchestrations by Tony award-winner Doug Besterman (The Producers) and Stephen Trask (Hedwig and the Angry Inch) with music supervision by David Holcenberg (Matilda).

Source: Twitter