Princess Eugenie and her husband Jack Brooksbank attended the Service of Thanksgiving yesterday morning, alongside members of the Royal Family.
The Princess surprised onlookers by showing off a small tattoo, located behind her ear, appearing to be a small circle or heart.
The Queen's granddaughter usually styles her hair down at royal engagements, but the half up, half down do revealed the inking.
It is believed to be the first time the Princess has revealed the tattoo.
The small tattoo was spotted behind the Princess's left ear
PA
The 32-year-old Princess splits her time between London and Lisbon, where she moved with husband Mr Brooksbank and son August, earlier this year.
Princess Eugenie sat next to her husband Jack Brooksbank and cousin Prince Harry
Victoria Jones
Eugenie sported a bright orange dress from designer Emilia Wickstead, a firm favourite of Kate, Duchess of Cambridge.
The Princess and her sister princess Beatrice did not appear on the Palace balcony for Trooping the Colour, as the Queen reserved spaces for working members of the Royal Family.
In an Instagram post, Princess Eugenie said: "Celebrating 70 years.. couldn't be prouder! Thank you, Your Majesty, for 70 years of dedication and selflessness. We love you!"
The Princesses father, Prince Andrew, was absent from Jubilee celebrations after testing positive for covid earlier in the week.
Eugenie isn't the only member of the royal family with a tattoo, Lady Amelia Windsor, the granddaughter of the Queen's cousin, Prince Edward, is a model and often flaunts her tattoos in photoshoots and on Instagram.
Platinum Jubilee celebrations continue today, with members of the Royal Family expected to attend the Epsom Derby this afternoon and the Platinum Party at the Palace this evening.
The Queen has refrained form participation in events following the Trooping the Colour parade on Thursday as reports stated her Majesty was experiencing "discomfort".