Lydia - who took to Instagram to show off her polished ensemble - rocked up to the palace in a fancy floral frock from her very own Bella Sorella collection and she teamed the summery, vintage-inspired number with a beautiful, azure, longline jacket.
Of course, it wasn't long before her fashion savvy fans took to the comments section to ask where they can snap up the Kim Kardashian-esque duster, but you can call us fashion magpies because we recognised it from the first glance!
Lydia looked to online style hub Pretty Little Thing for the swishy, billowing jacket that boasted oversized lapels and cropped sleeves and the best part is that it's currently on sale for a super affordable £22!
Nope, we lied. The best part is that you can snap it up in blush pink and khaki, too.
Lydia captioned her snap, "What an honour. Me and mum attending the @barnardos_uk #150Years afternoon tea at Buckingham palace."
The reality star and her lovely mum Debbie Douglas have both worked alongside Barnardo's to raise awareness of fostering, and amazingly, passionate Debbie has fostered over 250 children in 22 years.
Follow us on Twitter @RevealMag for all your celeb, fashion and beauty news!
Fancy winning some GREAT prizes? Check out Reveal Competitions here!