The 37-year-old actress – known for playing played the role of Katie Sugden in the ITV soap, from 2001 to 2015 – uploaded the snap to her Instagram late last week.
She explained to her fans that she had met her Human Resources manager husband Martyn Hardy while the pair were at school together.
In a caption detailing the ins and outs of how she met her longtime partner, the star admitted they have little to no old photos of the beginning of their relationship which started almost 24 years ago.
The vintage photo showed a youthful Sammy wearing a school uniform as she smiled towards the camera.
Behind her, Martyn wore a similar outfit minus the wool jumper and sported a beanie hit as he lovingly wrapped his arm around his future wife.
Sammy wrote to her Instagram followers: ‘Young love. We literally have about 5 photos of us from our school days together so when a new one resurfaced the other day we were over the moon. I was 13 here and only went and married the guy! Xxx [sic].’
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Fans and friends rushed to the comments to share their thoughts and amazement at her relationships and lasting youth.
One said: ‘Honestly you still look the same how is this possible one true love forever x [sic].’
Another typed: ‘Wow. You’re super lucky to find this kind of long true lasting love [sic].’
‘You’ve not changed much, still a fair beauty [sic],’ a social media user gushed over the star’s unchanged appearance in the snap.
Updating her followers on their love story, in October last year, Sammy posted a note in celebration of the couple’s fourth wedding anniversary.
The star shared a selfie they had taken on a train together and penned an adorable caption outlining the timeline of how things blossomed for the old friends.
She said at the time: ‘On our way home from our London celebrations. Had the most magical weekend. The ballet, comedy clubs, food, food, and more food and walking until our feet hurt.
‘Six years today being engaged to the love of my life, four years married, 24 years of friendship and still going strong. Here’s to 24 more.’
Sammy is a mum to 17-year-old Mia who she shares with her ex-fiancé and footballer David Dunn, 43.
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