The Queen has tweeted her thanks to people who sent her 90th birthday messages on social media.
She wrote: "I am most grateful for the many digital messages of goodwill I have received and would like to thank you all for your kindness."
The monarch signed off the rare message "Elizabeth R."
Just in case royal fans missed the sovereign's input, the Royal Family's official Twitter account declared: "This tweet was personally sent by Her Majesty The Queen."
The Queen sent her first ever tweet in 2014 when she opened a new Science Museum exhibition with the message: "It is a pleasure to open the Information Age exhibition today at the @ScienceMuseum and I hope people will enjoy visiting. Elizabeth R."
@RoyalFamily also posted a picture of the Queen at Windsor Castle about to press "send" on her tweet.
It showed the monarch in the ornate white drawing room, sitting at a desk on which was placed a raised tablet. The Queen, dressed in a pink dress decorated with orange and blue flowers and wearing pearls, had one finger poised, ready to tap the screen.
Lewis Wiltshire, senior director of media partnerships at Twitter UK, said: "The Queen's milestone birthday was a huge occasion on Twitter, with users expressing their love and admiration for Her Majesty's lifelong commitment on her 90th birthday.
"It's really exciting to see the Queen directly respond to the Great British public for their birthday wishes on the platform with her second ever tweet."