Question: Which client of Lindka Cierach played Queen Elizabeth II in "The Queen"?

Lindka Rosalind Wanda Cierach is a British couturier and fashion designer.  Notable clients include members of British and European Royal Families, Helen Mirren, Lady Victoria Hervey and Cherie Blair among others. <SEP> Dame Helen Lydia Mirren, {'1': ", '2': ", '3': ", '4': "} ("née" Mironoff; born 26 July 1945) is an English actor.  Mirren began her acting career with the Royal Shakespeare Company in 1967, and is one of the few performers who have achieved the Triple Crown of Acting, having won the Academy Award for Best Actress in 2007, after two previous nominations, for her performance as Queen Elizabeth II in "The Queen".  She received an Olivier Award for Best Actress in 2013 for her West End performance in "The Audience", in which she also portrayed Elizabeth II, and in 2015 she won the Tony Award for Best Actress in a Play for her Broadway performance in the play.  "The Audience" was written by Peter Morgan, who also wrote "The Queen".  Mirren won three consecutive BAFTA Awards for Best Actress between 1992 and 1994 and her first of several Emmy Awards in 1996 for her performance as police detective Jane Tennison on the British television series "Prime Suspect", which ran for seven seasons between 1991 and 2006. <SEP> Sarah Ferguson wore a dress made from ivory duchesse satin and featuring heavy beadingfor her wedding to Prince Andrew, Duke of York on 23 July 1986 at Westminster Abbey.  Designed by Lindka Cierach, the beadwork incorporated various symbols including hearts representing romance, anchors and waves representing Prince Andrew's sailing background and bumblebees and thistles, which were taken from Sarah Ferguson's family crest.  Copies of the dress, including the motifs specific to the royal family, went on sale in stores just hours after the end of the wedding.Influenced by the wedding dress of Lady Diana Spencer, a notable feature of Sarah Ferguson's 17 foot long train was the intertwined initials A and S sewn in silver beads.  The head-dress and bouquet, fabric rosettes or artificial silk flowers were used to adorn the gown itself.  Ferguson was pleased with the dress, describing it in her 1997 memoir, "My Story", as "an exquisite creation I'd lost twenty-six pounds to fit into.  Lindka was a genius; I knew she could make the most flattering gown ever, and she had.  It was amazingly boned, like a corset. "Hair stylist Denise McAdam and make-up artist Teresa Fairminer attended to the bride, while florist Jane Packer designed the bouquet.  The ivory silk wedding dress became the season's most sought-after style. <SEP> On 6 February 2017, the Sapphire Jubilee of Queen Elizabeth II, marking sixty-five years of her reign, occurred.  The longest-reigning monarch in British history, Queen Elizabeth II was the first British monarch to have a sapphire jubilee.  This Jubilee featured blue stamps from the Royal Mail, commemorative coins from the Royal Mint, and a reissue of an official 2014 portrait of Queen Elizabeth II by David Bailey.  In this official portrait the Queen wears sapphire jewellery which she received as a wedding present from her father.  The Jubilee also involved a gun salute at the Tower of London, a gun salute in Green Park, gun salutes in several other places around the United Kingdom, and the ringing of the bells in Westminster Abbey.  Theresa May, the Prime Minister of the United Kingdom, congratulated Queen Elizabeth II in regard to the occasion, saying in part, "I know the nation will join with me today in celebrating and giving thanks for the lifetime of service Her Majesty the Queen has given to our country and to the Commonwealth."