The 500+ signatories, which include Tony winners Wendell Pierce, Maleah Joi Moon, and James Monroe Iglehart, call on the American Theatre Wing and the Broadway League to take immediate action, not only in response to LuPone’s comments but in “establishing a broader standard of accountability moving forward.”

For as long as I have worked in the theatre, I have spoken my mind and never apologized,' LuPone said. 'That is changing today.'

More than 500 Broadway artists signed an open letter slamming Patti LuPone over her recent comments against Audra McDonald and Kecia Lewis.