American Comedy Institute Teachers

Stephen Rosenfield, Director

Stephen is the Director of the American Comedy Institute. He coaches and directs performers ranging from beginners to Emmy and Tony Award-winning and Oscar-nominated star talent.

Stephen has been a guest artist and lecturer in comedy at Brigham Young University, Virginia Commonwealth University, Barnard College, University of Washington, The New School, New York University, and the Union Theological Seminary. He was the founding Artistic Director of Humber College’s Program in Comedy, a former Professor of Theatre and Comedy and the former Director of the Comedy Program at William Patterson University. He is currently a member of the Board of Directors of the National Association of Schools of Theatre (NAST). Stephen has a BA in Theatre and Drama cum laude from Lawrence University and a MFA in Theatre Direction from Stanford University. Read Stephen’s Full Bio

Lexi Cullen-Baker, Associate Director and Teacher

ACI_Faculty_Cullen_Baker2Lexi Cullen-Baker teaches stand-up. She has had the privilege of working alongside of Terrence Mann and Christopher d’Amboise at the Minetta Lane Theatre as well as worked with Lewis Black at the Williamstown Theatre Festival. She regularly performs at clubs and colleges all over the country.

She has been featured in Stamford Advocate and Next Magazine.  She has been seen on Bravo TV and Comedy Time TV. Lexi has a BA in Theatre and Dance from Washington University in St. Louis and is also a graduate of the American Comedy Institute’s One Year Program. She is a professor in the Theatre and Comedy Department at William Paterson University in New Jersey.

Joe Schiappa, Teacher

ACI_Faculty_JoeSchiappaJoe Schiappa is a writer, performer and instructor based in New York City. He was the head writer for 2015 MTV Fandom Awards, MTV’s New Year’s Eve 2015 and the creator of Truth or Dare which premiered on MTV(other) in 2014. He has written for Prank Academy on Youtube RED, MTV’s Money from Strangers and MTV’s Silent Library.

Joe is also a winner of the Sierra Mist Creative Lab. He has worked as a theater director and writer specializing in developing shows that have gone Off Broadway, to the HBO Comedy Festival in Aspen in 2003 and 2007 and the Strip in Las Vegas. He also performs as one-half of the improv duo Nathan + Joe. He has taught both improv and sketch for over a decade at the People’s Improv Theater and American Comedy Institute in New York City. He has written and/or worked with Mindy Kaling, Steve Buscemi, Louis C.K., Tarran Killam, Natasha Leggero, Ken Jeong and Mayor Bill DeBlasio. Joe trained with the Second City and Shira Piven of the Piven Theatre. He performs all around New York City.

Chris Roberti, Teacher

Chris Roberti is an actor and writer in Brooklyn, NY. He can be seen on HBO’s High Maintenance and Comedy Central’s Broad City.  For the past ten years he has been performing and teaching improv and sketch comedy at The People’s Improv Theater, The New York Film Academy, Duke, Columbia, Yale, and the New York City Public Schools. He is a founder of Bankrukt Productions.  He holds a Masters in Education from Harvard.

Deb Rabbai, Teacher

ACI_Faculty_DebRabbaiDeb Rabbai has been performing professionally for the last twenty five years. She’s a producer, co-artistic director and performer who tours the country in the critically acclaimed improvised musical comedy awards show, “Broadway’s Next Hit Musical!”.

She performed with the National touring company of Chicago City Limits for seven years, TheatreSports New York for ten years and ComedySportzNY for five years. She is an experienced teacher of improvisation and acting who has taught at New York University, Marymount Manhattan, Humber Comedy Center, New York Improv Festival, Funny Women Festival, Orlando Fringe Festival, Improv etc. & Weist Barron.

She has led workshops on “Teamwork and Creativity” to corporate executives with Molson Coors, ABInBev, Revlon, Oxygen Network, Merck, Pfizer, AAA, Bristol Myers Squibb, Credit Suisse and Genentech among others. She has created programs which teach curriculum through improvisation and has taught improvisation through Arts Connection, Arts Horizons, Young Audiences and Theatre for a New Audience in the New York, New Jersey & Connecticut public schools.

She’s appeared on Late Night with Conan O’Brien and in a commercial for Mastercard. She’s done voiceovers for television and radio for products you love and created the voice for “Shenfa” in the SEGA Dreamcast game Shenmue. She is well known as a voice actress among anime fans having voiced over 40 anime films. She is a graduate of the American Academy of Dramatic Arts.

Ted Greenberg, Guest LecturerTed-Greenberg

Ted Greenberg teaches late night talk show writing. He is an Emmy Award winning comedy writer formally a staff writer for Late Night with David Letterman. He also was an editor for the Harvard Lampoon humor magazine.
Mr. Greenberg is a stand-up comic and the star of the hit off-Broadway show, THE COMPLETE PERFORMER. It has played weekly at the Soho Playhouse since August of 2008 and is co-written and directed by Stephen Rosenfield.

Stan Zimmerman, Guest Lecturer

stan-zimmermanStan Zimmerman teaches Sitcom Audition Technique. Stan’s television comedy credits include: Writer/Producer: Gilmore Girls (WB), Roseanne (ABD) WGA Nomination- Best Comedy Episode for the famous “Kiss Episode.” The Golden Girls (NBC) WGA Nomination-Best Comedy Episode and Writer: Annie (ABC-Movie of the Week). His film credits include: Writer: The Brady Bunch Movie and A Very Brady Sequel.

Chris Mazzilli, Guest Lecturer

Chris Mazzilli is the owner of Gotham Comedy Club and executive producer of Gotham Comedy Live on AXS TV.  Chris lectures on making standup comedy a professional career.

Becky Veduccio-Langton, Kids & Teens Instructor

Becky Veduccio-Langton has been a professional comedian, writer and actress for over 15 years. She has performed standup comedy and improv in New York, Los Angeles, Las Vegas and London and has appeared in commercials, theatre and feature films.

Her film work includes Return To Me, Maid In Manhattan and Random Hearts. As a writer, she was chosen as one of’s top five “Fave Mommy Bloggers” for her humorous articles in “Woman Around Town” Magazine. In 2015, she won the New York Press Club Award for Humorous Writing. As an instructor, Becky has taught standup comedy to every age group – from elementary school and teenagers to University students and adults. She believes everyone has a comedic voice! Becky currently lives in Bloomfield, NJ and is the proud mom of three children who she says are the “greatest and most inspirational productions” she could have ever hoped for.

Andrew Ginsburg, Instructor

Andrew Ginsburg is a stand-up comedian and writer who has performed in comedy clubs and colleges across the country. His TV appearances include “The View,” “Saturday Night Live,” “The Sopranos,“ “All My Children,” “As The World Turns,” “The Guiding Light” and “One Life to Live.”

You have also heard Andrew on Sirius/XM’s “Laugh Attack,” “Hey, Get Off My Lawn” and Martha Stewart Living Radio. His humor has been published in The New York Times, New York York Post, Huffington Post, Details Magazine, Muscle and Fitness Magazine, and Glamour Magazine.

Ginsburg has 4 comedy albums available on iTunes and his new album “Eat the Yolk” debuted in the top ten on the iTunes Comedy Chart.