LONDON, ENGLAND - MARCH 17: Queen Elizabeth II and Prince Philip, Duke of Edinburgh attend the offical opening of 'The Land Of The Lions' exhibit at London Zoo on March 17, 2016 in London, England. (Photo by Samir Hussein/WireImage)
LONDON, ENGLAND - MARCH 17: Queen Elizabeth II and Prince Philip, Duke of Edinburgh attend the offical opening of 'The Land Of The Lions' exhibit at London Zoo on March 17, 2016 in London, England. (Photo by Samir Hussein/WireImage)