VIDEO: Sylvester Stallone Takes On ROCKY Egg Challenge on 'Letterman'

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Sylvester Stallone appeared on last night's LATE SHOW WITH DAVID LETTERMAN on CBS and went 'full Rocky' by chugging a glass full of raw eggs. Check out the appearance below!

The new Broadway musical ROCKY opens tonight, Thursday March 13th. ROCKY features an original score by the Tony Award-winning team Stephen Flaherty and Lynn Ahrens (Ragtime, Once on This Island), with 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 Tony nominee Alex Timbers, and features choreography by Tony nominee Steven Hoggett(Once) and Kelly Devine (Rock of Ages).

ROCKY brings to life the iconic and inspiring story of struggling small-time Philly boxer, RockyBalboa, 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.

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