 Her first role after graduation was playing Miranda, with Paul Scofield as Prospero, in a production of "The Tempest" in the West End of London.Her theatre work in Canada includes "A Midsummer Night's Dream" at Stratford Third Stage; "Zastrozzi" and "Criminal Genius" at the Factory Theatre; "Hamlet" and "Mother Courage" for the National Arts Centre; "The Seagull" and "The Member of the Wedding" at Tarragon Theatre; and "OD on Paradise" at Theatre Passe Muraille.Guadagni has been nominated for five Gemini Awards for her work on television, and received the award in 1998 (Best Supporting Actress, "Major Crime") and 2004 (Best Actress in a Guest Role, "Blue Murder", "Eyewitness").