Photos: Andrew Rannells, Rory O'Malley, More Celebrate The Book of Mormon's 15th Anniversary on Broadway

The Broadway production of The Book of Mormon—winner of nine 2011 Tony Awards, including Best Musical—celebrated its 15th anniversary at Broadway's Eugene O'Neill Theatre March 19.

The curtain call featured a post-show speech from the musical's creators and a special reprise with over 30 Mormon alum, including original cast members Andrew Rannells and Rory O'Malley. Check out photos from the celebratory evening in the gallery below.

The Broadway cast is currently headed by Kevin Clay as Elder Price, Diego Enrico as Elder Cunningham, Sydney Quildon as Nabulungi, Charlie Franklin as Elder McKinley, and Jacques C. Smith as Mafala Hatimbi.

READ: 5 Reasons to See The Book of Mormon on Broadway

Earlier this week, Mormon co-creators Trey Parker, Matt Stone, and Robert Lopez announced on The Late Show With Stephen Colbert that the June 9–14 performances of the Tony-winning musical will feature appearances in every show by original cast members, including Tony nominees Josh Gad (Elder Cunningham) and Rannells (Elder Price), Tony winner Nikki M. James (Nabulungi), and Tony nominee O’Malley (Elder McKinley). The original cast members, celebrating the musical's 15th anniversary, will perform select scenes and songs at each performance alongside the current cast, with no show exactly the same. The “Magical Mormon Mystery Week” performances will also feature Parker, Stone, and Lopez as well as Broadway’s original Mormon and Ugandan ensembles at certain performances, plus other surprise guests from the Mormon family throughout the week. Tickets for the special performances are now available at ATG Tickets.

The Book of Mormon is the longest-running show in the 100-year history of the Eugene O’Neill Theatre and the 10th longest-running show in Broadway history.

READ: As The Book of Mormon Nears Its 15th Anniversary, Broadway's Elder Price Is Nearing His 10th

The Book of Mormon opened on Broadway March 24, 2011, subsequently winning nine 2011 Tony Awards, including Best Musical, as well as the Grammy for Best Musical Theatre Album. The Broadway production also won five Drama Desk Awards, including Best Musical; the NY Drama Critics Circle Award for Best Musical; the Drama League Award for Best Musical; and four Outer Critics Circle Awards, including Best Musical.

The Book of Mormon features a book, music, and lyrics by Trey Parker, Robert Lopez, and Matt Stone. The production is choreographed by Casey Nicholaw and directed by Nicholaw and Parker.

Purchase The Book of Mormon memorabilia in the Playbill Store.

The musical also has set design by Scott Pask, costume design by Ann Roth, lighting design by Brian MacDevitt, sound design by Brian Ronan, hair design by Josh Marquette, orchestrations by Larry Hochman and Stephen Oremus, music supervision and vocal arrangements by Oremus, dance music arrangements by Glen Kelly, musical direction by Justin Mendoza, and casting by Carrie Gardner.

The hit musical will also celebrate its 15th anniversary by reissuing the Grammy-winning Ghostlight Original Broadway Cast Recording June 26 on two LP crystal-clear vinyl, two LP black vinyl, and CD. The commemorative releases will feature booklets that include complete lyrics, production and studio photos, and new commentary by authors Parker, Stone, and Lopez, and co-orchestrator, vocal arranger, and music supervisor Oremus, in conversation with CBS Sunday Morning correspondent David Pogue. Pre-order the reissue by clicking here.

The West End production opened in February 2013, winning four Olivier Awards, including Best New Musical.