Terri, 51, and Simon, 64, dated from 2002 to 2008 and have remained firm friends, and often spend time together with his fiancé Lauren, 46.
Taking to Instagram on Tuesday, Terri shared snaps of the Easter gathering – at which former Strictly Come Dancing judge Bruno Tonioli, 68, was also a guest – although he wasn’t wearing much.
In a snap of the whole group Simon and Lauren huddled together with Eric, 10, while Terri stood next to her husband Clark Mallon, 33, and daughter Coco, nine.
Further down the row, Bruno was seen going shirtless for the occasion and wearing blue jogging bottoms with a pair of bunny ears.
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Simon Cowell posed fora rare photo with son Eric, 10, as he and fiancée Lauren Silverman celebrated Easter with his ex Terri Seymour and a barely-clothed Bruno Tonioli – (L-R) Simon, Eric, Lauren, Lauren’s son Adam, Bruno Tonioli, Terri, her husband Clark Mallon, her daughter Coco and a family member)
The pals posed for pictures with a backdrop of palm trees and a luxury pool as they made the most of the sunny weather.
Terri donned an elegant baby pink skater dress for the lunch with a pair of barely-there stilettos.
Meanwhile Lauren welcomed in the spring as she sported a corset-style white and pink floral midi-dress.
Lauren opted for flat brown sandals and accessorised with a big pair of sunglasses and a gold watch.
Among the Easter picture gallery was one of Terri with her daughter and Lauren – showing the pair have formed a close friendship.
Their weekend appeared to be food-filled, as Terri shared pictures of a huge roast dinner spread and an appetising cheese board.
Simon, Lauren and Terri also celebrated the holiday together last year, which was revealed when Amanda Holden shared snaps of her Easter weekend with the trio.
And back in 2021, Terri and Simon filmed an ExtraT interview together in the garden of his Malibu home.
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Among the Easter snaps was one of Terri with her daughter and Lauren – showing the pair have formed a close friendship
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Their weekend appeared to be food-filled, as Terri shared pictures of a huge roast dinner spread
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There was also a mouthwatering cheese board
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Simon, Lauren and Terri also celebrated the holiday together last year, which was revealed when Amanda Holden shared snaps of her Easter weekend with the trio
In the pictures, Terri beamed as she sat with her former flame – during which she was wearing a stylish green leather dress.
Meanwhile Simon looked relaxed in a grey T-shirt and white shorts as he showed off his smooth complexion.
She captioned the post: ‘He’s always thrilled to do an interview with me! Tonight on @extratv my new interview with @simoncowell!!’
The post also included a short clip of Simon talking about his e-bike accident last year as he said: ‘Honestly if I could rewind I would go through the whole thing again, just because I feel better now, even though it hurt like hell.’
Terri and Simon also reunited in public that April, when they again celebrated the Easter weekend together in LA.
Among the snaps Terri shared to Instagram was a group image of Lauren coyly placing her arm around partner Simon as they posed for a group photo.
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Back in 2021, Terri and Simon filmed an ExtraT interview together in the garden of his Malibu home
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Terri and Simon also reunited in public that April, when they again celebrated the Easter weekend together in LA
Simon has remained close friends with ex Terri ever since they dated and he even threw a birthday party for her daughter Coco in 2020.
While Terri and Simon reportedly split over his desire to not have a brood – his situation is very different now, with him admitting in 2017 that their children often share playdates.
The music mogul was rumoured to have given her a £6million ‘parting gift’ when they split.
He then went on to become engaged to Afghan-born make-up artist Mezhgan Hussainy in 2010, but they split in February 2012.
Simon shocked fans in summer 2013 when it was revealed he was expecting his first child with American socialite Lauren – who was then married to real estate mogul Andrew Silverman.