Queen Elizabeth was showered with celebratory wishes on the streets around Windsor Castle as she hit the big 9-0 mark on Thursday.
Wearing spring grass green wool and silk weave coat and matching hat accented with flowers – made by her personal assistant and chief dresser Angela Kelly – the record-breaking monarch spent about 20 minutes receiving bouquets, gifts and even a cake alongside her husband of 68 years, Prince Philip.
"She looked so lovely," fan Margaret Tyler tells PEOPLE. Tyler handed over a cake decorated with a corgi to a lady in waiting. "One of us called out, 'Each time we see you, you look younger.' She smiled."
The first hint she was to appear came when the band of the Coldstream Guards played "God Save The Queen" at mid-day.
She was driven in her burgundy Bentley through the Advance Gate of Windsor Castle, where she got out at the King Henry VIII gate.
Then, when she stepped out, the Coldstream Guards band led the musical welcome, with "Happy Birthday."
She then began her 100-yard walkabout down Castle Hill, before turning left down the High Street for another 80 yards to the 17th-century Guildhall.
Halfway down, Prince Philip delivered some of his customary quick-wit. Seeing two Yorkshire terriers (named Wallace and Gromit) he asked owner Denis Melvin where he'd come from. He had traveled from south Wales – about 100 miles west along the M4 highway. "Have you taken the wrong turning on the M4?" Philip asked with a smile.
Philip, who turns 95 in June, showed his surprising strength when he lifted a little boy over a barrier so he could meet the Queen.
Four-year-old Ethan Lynch had been waiting to catch a glimpse of the Queen since 7:30 a.m. with his grandmother, mother and sister. The family chatted with Philip, who then picked up Ethan and carried him over the three-foot metal barrier so he could give the Queen some flowers.
"He just lifted him over the barrier and asked if he wanted to bring flowers over," Ethan's mother Elizabeth told reporters. "He was so chatty and obviously loves children."
Ethan's grandmother Teresa then told reporters, "For his age – to lift a boy that size is impressive."
After stopping at the town's Guildhall, the Queen and Philip got into an "open state review" Range Rover (a.k.a. the "Queenmobile" for a drive through the streets of Windsor.
"She looked beautiful, glowing," said Donna Werner of Connecticut. "She smiled and nodded her appreciation for honoring her on her special day."
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Her friend Mary-Jane Willows added, "She seems to have a way of acknowledging you without talking. She's had 90 years of practice at that!"
The walkabout was ostensibly to unveil a plaque marking a four-mile Queen's Walkway connecting 63 points of significance in the town.
The number 63 is significant as it recognizes the moment that the Queen became Britain's longest reigning monarch on September 9, 2015.
The crowds had begun emerging shortly after dawn. Pressed up against the railings with a good view was Cynthia Bowley, a retired translator from the Isle of Wight just off Britain's south coast.
"She's such a fantastic lady. We're lucky to have her," she tells PEOPLE. "My mother Maureen would have been the same age, but she died last year, so I'm doing this for her as well."
Waiting out since 5a.m was retired hotelier Elizabeth Morrison, 64, from Hemel Hempstead. "She's simply the best," she tells PEOPLE. "I was born in 1952, when she became Queen, and she's been here forever. Even if she doesn't want to go out and carry out her duties, she still does and still looks nice and happy."
American Brenda Weschke was in Windsor to take part in the party. "We don't have anything like this in the U.S.," she said. "It's absolutely amazing to see and witness and be part of."
This evening, the Queen will light the first of 1,000 beacons that criss-cross the country before heading to a private party for around 60 members of her family and close friends being organized by her son and heir Prince Charles.