Otto von Bismarck | Alex Ferguson | Alex Rodriguez | Otto | Alex Cox | Otto III | Otto Piene | Otto I, Holy Roman Emperor | Otto I | Alex | Alex Jones | Alex Chilton | Otto Preminger | Alex Trebek | Alex Salmond | Alex Katz | Alex Riel | Otto II | Otto Dix | Alex Ross | Alex Haley | Àlex Corretja | Otto Natzler | Otto II, Holy Roman Emperor | Otto Binder | Alex Moulton | Otto Skorzeny | Otto Schenk | Otto of Brunswick | Otto Kerner, Jr. |
A merchant's daughter, Hardt first took private acting lessons with Alex Otto and received theatrical engagements in Mönchengladbach, Rheydt and Altenburg.