 In 2008, director Arthur Laurents, unable to find an actress in the United States appropriate for the part of Maria in a Broadway revival of "West Side Story", discovered Scaglione after friends in Buenos Aires directed him to a YouTube clip of her performing Ástor Piazzolla's composition "Libertango".Laurents flew Scaglione to New York City to audition, where she immediately received the role, despite the fact that she was unknown in the United States.After performing as Maria at the National Theatre in Washington, DC, Scaglione made her Broadway debut in "West Side Story" at the Palace Theatre on March 19, 2009.