The British Emporium in Grapevine Texas hosted a 90th birthday celebration for HRH Queen Elizabeth on June 11, 2016.

The British Emporium in Grapevine Texas hosted a 90th birthday celebration for HRH Queen Elizabeth on June 11, 2016.

Queen Elizabeth II -- a.k.a. Prince George and Princess Charlotte's great-nan -- turned 90-years-old on April 21, but the royals know the secret of great birthday bashes: Throw them in summer, when the weather's likely to be nicer and sunnier than a typical English day. 

Grapevine's British Emporium celebrated the United Kingdom's longest reigning monarch on Saturday with a toast to the Queen and a gathering of corgis in her honor. Attendants watched a movie about her life and signed a card, to be sent to Buckingham Palace, before posing with a life-sized cut-out. 

Scroll through for pics of the posh fun: 

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