Queen Elizabeth II turned 96 on Thursday, and members of the royal family wasted no time paying tribute to the family matriarch.Prince William and Kate Middleton were two of the first to post a sweet message on social media for Her Highness.«Wishing Her Majesty The Queen a very happy 96th birthday today!» the Duke and Duchess of Cambridge wrote alongside two photos, one which showed Queen Elizabeth surrounded by her great-grandchildren and late husband, Prince Philip.A post shared by Duke and Duchess of Cambridge (@dukeandduchessofcambridge)William and Kate added, «An inspiration to so many across the UK, the Commonwealth and the world, it’s particularly special to be celebrating in this #PlatinumJubilee year.»The Platinum Jubilee is being celebrated this year in the Commonwealth to mark the 70th anniversary of the accession of the Queen Elizabeth II on Feb. 6, 1952.In a post on the Royal Family's official Twitter page, a portrait of the Queen as a toddler could be seen alongside the message, «Happy Birthday Your Majesty! Today as The Queen turns 96, we’re sharing this photograph of the young Princess Elizabeth aged 2.