Ana Vargas
Karen結束戀情後搬到新住處的新室友。跟Karen一樣懷抱舞台夢想，在百老匯圈尋求演出機會，渴望能夠登上舞台，綻放光芒。
Karen’s (Katharine McPhee) lively new actress roommate in NBC’s musical drama "Smash." Ana struggles with the realities of launching a career in the theater.
Kyle Bishop
Jimmy從小到大的好朋友，兩人合作組成音樂劇創作搭檔，本季他和Jimmy的加入，將有另一部全新音樂劇誕生，對《性感炸彈》會有什麼樣的影響？
A music composer who is creating a contemporary rock musical along with his writing partner, Jimmy Collins (Jeremy Jordan) in Brooklyn.
Jimmy Collins
曾獲東尼獎提名的Jeremy在本季飾演Jimmy Collins，一位在紐約布魯克林跟創作夥伴Kyle試圖譜寫現代搖滾音樂劇。他將和Karen發展出一段激情且充滿張力的戀情…。
A music composer who is creating a contemporary rock musical along with his music partner Kyle Bishop (Andy Mientus) in Brooklyn.
Eileen Rand
奧斯卡金像獎得主Anjelica Huston在本劇中飾演百老匯傳奇製作人Eileen Rand。出自對音樂劇這門藝術的熱愛，她必須高超地管理充滿競爭的團隊和日益高聳的財務支出。本季劇組資金發生問題，遭到凍結，製作只能暫時喊卡，沒想到幕後黑手竟然是…。
Academy Award winner Anjelica Huston stars as legendary Broadway producer Eileen Rand in NBC’s new musical drama "Smash." Driven by a passionate love of her art, she must masterfully manage both the warring egos of her creative team and her musical’s skyrocketing budget — even as ex-husband Jerry (Michael Christofer) freezes her assets.
Derek Wills
百老匯圈中最聰明最有才氣的導演和編舞家之一，同時也名列最性感，風流倜儻的花花公子名單裡。本季她和製作人Eileen間的對立關係，與Ivy間的戀情隨著音樂劇製作將有不一樣的變化，他會繼續導戲還是有新的發展…。
One of Broadway’s most brilliant director-choreographers – and one of its most seductive bad boys. But even Derek’s genius is strained by the demands of bringing an untested new musical to the New York stage.
Tom Levitt
作曲家Tom和負責填詞的Julia為音樂劇創作夥伴。本季隨著劇組製作走向和其他意外發展，他內心對於音樂劇的堅持，商業和藝術間的拉扯始終困擾著他。
A composer, who fights to help his old friend Ivy (Megan Hilty) achieve stardom at long last — and tries to maintain his cool when necessity pairs him with his arch-rival, the brilliant but arrogant director, Derek Wills (Jack Davenport).
Julia Houston
Julia努力試著將無止境的百老匯音樂劇工作和家庭生活之間取得平衡，上季舊愛意外現身，往日戀情復燃導致原本美滿的婚姻破裂。本季中她與夥伴Tom間的關係也將發生改變…。
Julia struggles to balance the relentless demands of Broadway with the needs of her family, and the return of her old flame, musical theater star Michael Swift (Will Chase), hasn’t made life any easier.
Ivy Lynn
經驗老道，多才多藝的Ivy Lynn, 一位基本班底演員，多年試圖成為家喻戶曉的明星，但每每只能待在擔任陪襯演出班底。上季末雖然沒有獲得飾演夢露一角，本季中卻有更多突破性發展，她將另覓出路，還是能夠最終如願成為永遠的女神夢露？
A seasoned triple-threat Ivy Lynn, an ensemble performer who has spent years pursuing stardom only to be bumped back into the chorus again and again. Ivy seeks to know whether she has finally earned her place in the spotlight or if she is destined to remain a minor player.
Karen Cartwright
一位有天賦但年輕沒有經驗的女孩Karen Cartwright。Karen必須學到在如同充滿大白鯊般困難和挑戰的專業音樂劇圈的海洋中，擊敗經驗豐富的對手Ivy贏得一生一次難得的角色。上季成功獲得夢露角色，但本季將有意想不到的難關著她…。
A talented, but green girl, Karen Cartwright. Newly arrived from Iowa in pursuit of her Broadway dream, Karen must learn to navigate the shark-infested waters of the professional theater to win the role of a lifetime against her competition, stage veteran Ivy Lynn (Megan Hilty), all while maintaining her integrity.