Case Dillard, Susan Lucci, Steffanie Leigh, and Cameron Mathison
(Courtesy of Disney Theatrical Productions)
Case Dillard, Susan Lucci, Steffanie Leigh, and Cameron Mathison
(Courtesy of Disney Theatrical Productions)

Good Morning America contributor Cameron Mathison made his Broadway debut in a cameo role in Mary Poppins on Wednesday, November 2. His performance will be shown as part of a special GMA segment celebrating the fifth anniversary of the musical on Broadway, to be aired on Monday, November 7 at 7am on ABC, in which Mathison becomes the first non-cast member in the show's seven-year history to attempt Bert's "proscenium walk."

Following the performance, Mathison, along with Mary Poppins stars Steffanie Leigh and Case Dillard, were greeted backstage by Mathison's former All My Children co-star, Susan Lucci.

For tickets and more information on Broadway's Mary Poppins, click here.