Gonet also has acted extensively in the theatre. In 1989, she appeared as Ophelia in the National Theatre production of Hamlet, with the title role being played by Daniel Day-Lewis, Ian Charleston and finally Jeremy Northam.
Gonet married English actor Nicholas Farrell in 2005. The couple co-starred in an episode of The Roman Mysteries as Queen Berenice of Judea and Emperor Titus, and as Mr. and Mrs. Musgrove in ITV's 2007 production of Jane Austen's Persuasion, and they both participated in a 2001 Shakespeare's Richard III audiobook. The couple have a daughter, Natasha, born in 2000.
She played Margaret Thatcher in the Moira Buffini play Handbagged in 2013 at the Tricycle Theatre, and in 2014 at the Vaudeville Theatre when the play transferred to the West End.
