Mario Greiner in a denim shirt, smiling, with glasses and beard - performer singer actor

Mario Greiner


Find out about Mario’s most recent shows and gigs in this section.

Berlin in the Battery presented by Carnegie Hall

In collaboration with Carnegie Hall, Mario is delighted to announce his role as a Producing Consultant as well as a featured performer in this production affiliated with the Weimar Republic Festival by Carnegie Hall with NYFA.

April 2024

The Frankenstein Project

Victor Frankenstein in The Frankenstein Project Off Broadway

As Victor Frankenstein, Mario is celebrating his Off Broadway debut written and directed by William Electric Black at Theatre for the New City. "The physically staged musical production, using four chairs, two platforms and an ensemble of 12 members depicts the book often using Mary Shelley’s own text to tell the Gothic tale of revenge after Victor’s reckless use of knowledge."

February 2024

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FutureFest at 54 Below

Presented by the Festival of New American Musicals and Open Hydrant Theater Company, this popular Los Angeles showcase spotlights rising local young talent in a celebration of the next generation of musical theatre artists, now back in New York City.

January 2024

Once Upon A Mattress

Minstrel (u/s), Ensemble in Uncle Upon A Mattress

There is an opening for a princess, and Mario is part of it. Under the direction of Johanna Pinzler, choreography by Michelle Potterf, and music direction by Emily Croome. Mario is cast as dancer/ ensemble in Once Upon A Mattress. In addition to that, he is covering the role of Minstrel.

November 2023

Yuri, Len in Dance With Me

Mario got to be part of a new original musical reading by Thalia Ranjbar (book & lyrics) and Matt Graham (music) produced by the Latiné Musical Theatre Lab. The Lab's Table Reading Series presents readings of new musicals and musicals-in-development, written by Latiné-identifying writers and writing teams.

October 2023

The Anabaptists

Voda in The Anabaptists

Yes, a new reading! Mario got to join the cast of The Anabaptist as Voda, a German ancestor, as well as as Gary and Dad. This play, written and directed by Louisa Nickel, is pushing boundaries.

October 2023

Cinderella at The Heights Players

Lionel (u/s), Ensemble in Cinderella

Mario is proud to announce that he is cast as a Dancer/ Ensemble member understudying the part of Lionel in The Heights Players' 68th season's production of Cinderella - Enchanted Edition. He is working with Director Felisha Heng, Assistant Director Morgan DeTogne, Choreographer Cassaundra Reed, and Music Director Anne Rebold.

October 2023

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Working with Rob Schneider and Michael Lavine, Mario is excited to announce that he will be part of the 50 Key Stage Musicals concert series at 54Below - next to no other than Stephen Mo Hanan, Steve Ross, Paige Davis, Talia Suskauer and many more talented artists. Mario will sing the part of Marius in a number from Les Mis.

July 2023

Head over Heels Musical

Musidorus in Head over Heels

Working with award-winning New York Times acclaimed director Stephen Nachamie, Mario got cast in the leading role of Musidorus in Head over Heels. This production is music directed by Joshua Zecher-Ross. JZR has worked on over 100 productions in New York and in the United States as a music director, orchestrator and conductor.

April 2023

Live Laugh Lie - Musical by Sotsky and Vaquero

Johnny in Live, Laugh, Lie

Mario is delighted to announce his cast as Johnny in Live, Laugh, Lie - directed by Meghan E. Farley, who is currently the Associate director of SIX on broadway. The show was written by award winning composer Julio Vaquero, and incredible writer Aliza Sotsky, both NYU MFA musical theatre writing graduates. This production is music directed by Nick Sienkiewicz.

January 2023

Professional voice over reel

In addition to professional training by Andy Roth, Kristy Cates and Jonathan Appel, Mario has an updated voice over reel available, including different commercial styles, and a German-English commercial at the very end. Learn more.

November 2022

The Addams Family Musical

Fester in The Addams Family

November 18-20, Mario can be seen as Fester in The Addams Family in a production directed by Rob Schneider, in collaboration with musical director Miles Plant, and choreographer Catherine DeLuce. The show is being produced by the New York Film Academy. Learn more on Broadwayworld.

October, 2022

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Mario is thrilled to announce that he will be performing a duet at IT TAKES TWO: BROADWAY’S EMOTIONAL ROLLERCOASTER at 54Below this October 5.


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Mario is continuing his studies at PCMT

After exploring a career in IT consulting at a big4 company during the pandemic, Mario is continuing his studies at the Professional Conservatory Of Musical Theatre at the New York Film Academy in August 2022.

August 2022

King Charles in Pippin

Mario started rehearsals for his role as King Charles in the PCMT production of Pippin at Battery Pl in Manhattan. Unfortunately the show was cancelled due to the rise of the pandemic.

March 2020

Wasp Woman Musical Workshop

Scientist Zinthrop in Wasp Woman Workshop

Based on the 1959 Roger Corman film "The Wasp Woman", Mario got cast as scientist Zinthrop in this comedy musical workshop, with music by Arthur Lafrentz Bacon, book & lyrics by Harris Doran.

February 2020

Dirty Rotten Scoundrels

André in Dirty Rotten Scoundrels

One of Broadway's funniest musicals is back in the city, in a production of PCMT of the New York Film Academy. Mario is cast as André, a corrupt French police chief and the co-lead of the show, charming and funny.

October 2019

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Let the journey begin: Mario comes to the big apple

In August 2019, Mario will begin his journey rigorous two-year conservatory at the Professional Conservatory of Musical Theatre at NYFA. The conservatory is known for its intense hands-on approach, including MainStage productions, stage work, as well as movie musical and camera work.

January 2019