Ziegler has appeared in many stage productions, including Twelfth Night for the Royal Shakespeare Company (2001); the theatrical version of Mr. Bean; Women Laughing at the Royal Court Theatre; Volpone, Inadmissible Evidence and Machinal, all at the National Theatre; Featuring Loretta and The Memory of Water – both at the Hampstead Theatre; The Lady from the Sea, Lyric Hammersmith/West Yorkshire Playhouse (1994: TMA Award, nomination for Laurence Olivier Award) and also starred as Sheila Birling in Stephen Daldry's award winning production of An Inspector Calls at the Aldwych Theatre and for the production's Australian tour, along with Lady Sneerwell in Deborah Warner's 2011 production of The School for Scandal at the Barbican Centre.