Who We Are



Under the leadership of Bernie Telsey from 2003-2007, Stephanie served on the casting teams of films including Dan in Real Life (Touchstone/Peter Hedges), Across the Universe (Revolution/Julie Taymor), Then She Found Me (Killer Films/Helen Hunt), and RENT (Columbia/Chris Columbus), as well as Broadway productions including Glengarry Glen Ross (David Mamet, Joe Mantello, dir.), The Odd Couple (Neil Simon, Joe Mantello, dir.), Three Days of Rain (Richard Greenberg, Joe Mantello, dir.), off-Broadway & regional theatre casting, and over 100 commercials.

Under the leadership of Tara Rubin (2010-2012), Stephanie worked on the film version of the classic musical Lucky Stiff (Flaherty & Ahrens, Chris Ashley dir.), as well as the 2011-2012 Yale Repertory Theatre season, which included an acclaimed production of Hamlet starring Paul Giamatti.

As an independent Casting Director, Stephanie has done associate work for Francine Maisler, including the Academy Award-winning film Birdman or The Unexpected Virtue of Ignorance. Other independent casting credits include: Akron, Take Care, 4 Eyes, and Hench. With Margaret Dunn, projects include: Born Yesterday and An Inspector Calls, both at the Maltz Jupiter Theatre; Uncommon Sense at the Tectonic Theater Project; Burn All Night at the A.R.T.; King Kong and West Side Story at the Fugard Theatre in Cape Town, South Africa; and the films Give Me Liberty (dir. Kirill Mikhanovsky), Sweet Home Tennessee (Opening Night Productions, Long Road Film), and A Little More Alive (TBD Productions).

As a Producer, Stephanie served on the Senior Artistic Staff of the Hangar Theatre in Ithaca, NY from 2009-2013, and in the same position at Barrington Stage Company from 2014-2016. At BSC, Stephanie ran the Second Stage, producing mostly new musicals and plays, and running Mr. Finn’s Cabaret, with Award-Winning Composer William Finn. From 2009-2017 Stephanie served on the faculty of New York University’s Tisch School of the Arts at the Stella Adler Studio of Acting. With Peter Flynn, Stephanie developed and ran a program that worked with graduating acting students to create a foundation for a unique and authentic career.

In 2015, Stephanie began working with Broadway, TV, and film producer Hunter Arnold and TBD Productions, which is currently represented on Broadway with Once On This Island, Dear Evan Hansen, Anastasia, and Kinky Boots. In 2017, Hunter partnered with Stephanie and Margaret Dunn to launch TBD Casting, a division of TBD Productions.



Margaret Dunn is a Casting Director and Creative Producer. She started her casting career at Telsey + Company, where she helped cast everything from Broadway musicals (Hairspray, Never Gonna Dance, Taboo, Tarzan) and plays (Enchanted April, Match, Frozen, Steel Magnolias), to national commercials, to Whoopi Goldberg’s eponymous sitcom. She then went to work for Julie Tucker, where she was the associate on the long running FX show Rescue Me and also helped cast numerous pilots and several TV shows, including Dexter, Book of Daniel and Beautiful People.

Before teaming up with Hunter Arnold and Stephanie Yankwitt to start TBD Casting, Margaret spent a decade doing creative development for the Shubert Organization. During her years there, the Organization developed and produced over two dozen Broadway and West End shows including: Passing Strange, God of Carnage, That Championship Season, Hugh Jackman: Back on Broadway, Once, Hedwig and the Angry Inch, This is Our Youth, School of Rock, Calendar Girls and Come From Away.

Previous to joining the Shubert Organization, Margaret spent several seasons as the Literary Manager at the Williamstown Theater Festival. While at Williamstown, she produced and cast a weekly reading series, featuring plays directed and/or written by: Itamar Moses, Robert Simonson, Jenny Giering, Annie Dorsen, Jonathan Bernstein, and Rebecca Taichman. While there, she also did production dramaturgy on both Mainstage and Nikos stage shows, collaborating with such lauded directors as Michael Greif, Darko Tresnjak, Nicholas Martin, Bruce Paltrow, and Chris Ashley. In that capacity, she was lucky enough to work alongside the playwrights Alfred Uhry, A.R. Gurney, Dan O’Brien and Eric Bogosian. Prior to Williamstown, Margaret worked in the literary offices of New York Stage & Film and Atlantic Theater Company.

Margaret has an MFA in Dramaturgy from Columbia University. Highlights from her time at Columbia include: doing Viewpoints exercises led by director Rachel Chavkin, collaborating with playwright Jocelyn Bioh, creating an imaginary theater with Managing Director Jeremy Blocker, and reading storybooks with Jeanine Tesori and David Lindsay-Abaire for a pre-Broadway workshop of the musical Shrek.

In her spare time, Margaret serves as the Producing Director of Stable Cable Lab Co., a not-for-profit theater that develops and produces new plays. The company has produced half a dozen world-premiere shows and has recently developed a commissioning program that focuses on pairing playwrights of different generations to write plays on a common theme. She also works as a freelance dramaturg and script reader for numerous theaters and foundations.



Mary is a New York-based actress and singer who’s now taking a step into the casting world. She has worked as Casting Assistant on the films Sweet Home Tennessee (Opening Night Productions/Long Road Film), Give Me Liberty (dir. Kirill Mikhanovsky), and A Little More Alive (Ross Katz/TBD Productions), as well as theatre projects Uncommon Sense (Tectonic Theater Project), Burn All Night (A.R.T./Oberon), and An Inspector Calls (Maltz Jupiter Theatre). Mary has assisted in casting multiple projects with the Mainspring Arts Cooperative in NYC and the international award-winning Fugard Theatre in Cape Town, South Africa.

In her acting career, Mary can be seen in multiple international commercial campaigns and on national television, most recently shooting a national commercial spot for RCN Cable and appearing on the Amazon original series The Marvelous Mrs. Maisel (dir. Amy Sherman-Palladino), winner of two Golden Globes, including Best Television Series – Musical or Comedy in 2018. She has performed in prominent New York theatres, including The Cherry Lane Theatre, Joe’s Pub at the Public Theater, The Davenport, and Radio City Music Hall, as well as with indie theatre companies Nylon Fusion Theater Co. and Strindberg Repertory Theatre. Mary is a musical theatre/film acting graduate of Tisch School of the Arts at NYU.