Most of the royal family were in attendance, including Princess Anne, the Duke and Duchess of Cambridge, the Duke and Duchess of Sussex and Princess Eugenie and Princess Beatrice.
WATCH: Royals sing along with national anthem
Speaking of the redhead royal; didn't she look gorgeous? The mother-of-one wore a dazzling turquoise dress by Beulah London. The brand's best-selling 'Ahana' dress has a longer sleeve length and is super elegant; it has a fit and flare silhouette with a short stand neckline and a sweeping skirt that's belted at the waist for a figure-defining fit, as well as a charming button-front. It costs £775 and is quite the statement number.
But Beatrice wasn't the only royal wearing this design; Sophie Winkleman, who is married to Lord Frederick Windsor, wore the same dress in pink. Wow! Sophie added Kate Middleton's favourite bag, the Aspinal Midi Mayfair, in ivory, to her look.
Beatrice in her Beulah London dress
Although it undoubtedly was the same style, due to the contrasting colourways, it wasn't immediately obvious the royal ladies had donned the same number. Phew!
Sophie Winkleman wore the same dress in pink
Beulah London was founded in 2010 by Natasha Rufus Isaacs and Lavinia Brennan and has many celebrity fans. From the Duchess of Casmbridge and her sister Pippa to Sarah Jessica Parker, Sienna Miller and Kate Moss. What a client list!
SHOP SIMILAR: Hot Pink Satin Midi, £59 / $110, River Island
The service was beautiful and ran smoothly, although Her Majesty The Queen didn't attend.
Ahana Crepe Midi Dress, £775, Beulah
She announced she would be absent due to experiencing "some discomfort" at her Birthday Parade, Trooping the Colour, on Thursday.
You can also buy the same dress in pink
Prince Andrew was also forced to pull out of the event after he tested positive for COVID-19, and the Archbishop of Canterbury, Justin Welby, will also miss the service as he too has coronavirus and is now resting at home after cancelling all his prior engagements for this week.
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