Yellowfin Grouper, P.I. LIVE at Laurie Beechman Theatre was Sunday, June 5th at 7pm. Read more about the cast below! Check out footage from the night on our youtube channel below.

Meet the LIVE CAST:

Matt Deitchman

Conductor/The Fish Chorus and others

Matt Deitchman is a music director, orchestrator, actor, composer, multi-instrumentalist, and co-creator of Yellowfin Grouper, P.I. and can’t wait for you to swim on down! Credits include Trevor the Musical (Stage 42, Disney+) and various regionals incl.: Chicago Shakespeare Theatre, Lyric Opera of Chicago, South Coast Repertory Theatre, Shakespeare Theatre Co. (D.C.), Asolo Repertory Theater, Marriott Theatre. For more,, IG: @mattydeitch

John Edwards

The Fish Chorus and others

Actor/Singer/Dancer/Songwriter. Currently starring in MJ The Musical (Jackie Jackson/tour singer/James Brown soloist) Previously seen in NYC revival of Smokey Joe’s Cafe (Chita Award winner, Lucille Lortel nominee). Broadway and 1st National Tour of Jersey Boys (Hal Miller/Barry Belson/others). National/International tour of Hairspray (Seaweed J. Stubbs) and In the Heights at The Kennedy Center (Domingo). And more. IG @therealjohnedwards

Jed Feder

Yellowfin Grouper, P.I.

Jed is an actor, drummer, and composer. He is co-creator of Yellowfin Grouper, P.I. and so thrilled that so many people are diving in with us! Credits include Kassim on the Natl. Tour of Aladdin, Uri Savir in Broadway in Chicago/TimeLine's Oslo, and drums for Trevor Off-Broadway.,  @jed_underscore

Julia Lennon

The Fish Chorus and others

Julia Lennon (she/her) is so excited to be a part of Yellowfin Grouper, P.I.! Julia is an NYC-based actor and singer. Recent credits: Rosie Revere, Engineer and Friends (TheaterWorks USA), Mamma Mia!, Sister Act (Downtown Cabaret Theater), Henry VIII (Valley Shakespeare Festival) The Wolves (Lyric Stage Company of Boston). IG: @julialenn0n Website:

Yando Lopez


Broadway: Wicked (Ensemble, Boq u/s). TV: The Thing About Harry (Freeform). Regional: Steppenwolf, Goodman, Paramount, Marriott, Drury Lane, Skylight. BA: Northwestern University. Thank you to Matt, Jed and Scott. Follow him @yandolopez &

Alyssa Marvin

Jumbo the Shrimp

Alyssa Emily Marvin is a fourteen-year-old New York-based actress.  She recently appeared as Cathy in the off-Broadway production of Trevor the Musical and originated the title role of Edie in the world premier of Edie Saves the Birds at Theatre East.  Other theatre credits include the First National Tour of School of Rock (Marcy), the International Tour of Annie (Molly), Number the Stars (Kristie - off-Broadway); Pie Lessons (Gloria -  originated at the Metropolitan Playhouse), Sometimes Gay Means Happy (Crystal - originated at the Planet Connections Theatre Festival), Showboat (Young Kim), and Miracle on 34th Street (Susan).  Alyssa can also be seen and heard in voiceovers, commercials, television shows, and short films.; Instagram: @alyssaemmarvin

Mike Nappi

Trumpet/Various Creatures

Yellowfin Grouper P.I. for life! Theatre: Roundabout Theatre Company, Paper Mill Playhouse, Goodspeed, NAMT, Marriott Theatre, Adirondack Theatre Festival, Walnut Street Theatre, Rubicon Theatre Company, Bucks County Playhouse, Bloomington Playwrights Project, Nebraska Repertory, Seven Angels Theatre, Maples Repertory, 11th Hour Theatre Company, Fairfield Theatre Company.

Nathaniel Stampley

Brain Coral

Broadway: PARADISE SQUARE, Cats, The Gershwins’ Porgy and Bess, The Color Purple (original and revival), The Lion King (Broadway, West End). Off-Broadway: The Secret Life of Bees, Atlantic Theater Company; Big Love, Signature Theatre NY; The First Noel, Classical Theatre of Harlem (AUDELCO nomination). Regional: Paul Robeson, Crossroads Theatre Company; Man of La Mancha(Jeff Award), The Bridges of Madison County (Jeff nomination), Marriott Theatre; Pacific Overtures, Chicago Shakespeare Theater; Violet, Once on This Island and Big River (Jeff nomination), Apple Tree Theatre; Dreamgirls, Milwaukee Repertory Theater. He is a Lunt-Fontanne Fellow (Ten Chimneys Foundation)

Tiffany Tatreau


Tiffany Tatreau is an actor and singer based out of New York City. She originated the role of Ocean O’Connell Rosenberg in new musical Ride the Cyclone at Chicago Shakespeare Theater. She then reprised the role Off-Broadway at MCC Theatre, 5th Avenue Theatre, and Alliance Theatre. (Cast album now available on all streaming platforms.)  She has also been seen regionally at Marriott Theatre, Drury Lane Oakbrook, and Pittsburgh CLO in musicals like Rock of Ages, Mamma Mia!, and Sister Act. For more, check out

Gene Weygandt


Broadway: Come From Away, Wicked, Big.  Tours: A Christmas Story, Wicked (I &II), Come From Away (AU, NZ) Regional: The Lifespan of A Fact, Something Rotten, Rock of Ages, 42nd Street, Me And My Girl. Little Shop of Horrors, The Taming of the Shrew, The Miser, Old Jews Telling Jokes, Annie, Lend Me A Tenor, Inspecting Carol  Film: The Birdcage, The Babe,  TV: Murphy Brown, Home Improvement, Cybill, Chicago Fire, Empire, Boss, Coach, Ellen, Drew Carey. BMW Motorcycles