Jean Peters modeled her character after Greta Garbo, a reclusive foreign actress who goes into seclusion following the demise of her lover at the height of her career.
The title refers to the eighteenth century Irish ballad "The Wearing of the Green" about social conditions at time of the Irish Rebellion of 1798. A shamrock worn on your hat was a sign of support and possible membership in the Society of the United Irishmen, a republican revolutionary organization.
The bottom section of the artwork on the banners in the "Siobhan O'Dea Theatre" bears an almost suspicious resemblance to the artwork for the original Broadway production of Sweeney Todd: The Demon Barber of Fleet Street, which Angela Lansbury had starred in nine years earlier