The former Only Way Is Essex girls were both at the Pure clothing trade show at London Olympia when they spotted each other in the crowd.
Pleasing their fans no end, Lucy and Lydia then posed for a selfie together before uploading it online. Alongside it, Lucy said: "Look who I bumped into at @PureLondonShow :) miss my Lyds! x."
Fresh from her recent travels to Asia, Lydia has thrown herself back into work and was at the Pure show on behalf of her fashion company Bella Sorella.
Earlier, she had tweeted to her fans: "Off to @PureLondonShow with @BellaSorella251 to do our AW14 season buying. Best part of my job."
Lucy, meanwhile, has her own line - With Love, Lucy - so no doubt she was stocking up on essentials too.
Lydia and Lucy aren't the only former TOWIE stars to attend the show either, as Amy Childs took to the catwalk yesterday to model her Spring /Summer '14 collection.
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