The weekend-long affair saw Kathryn, her husband Padraig and daughter Ellie dance the night away in the spectacular castle grounds.
Thomas caught up with fellow presenter Ray D’Arcy at the 2019 National Ploughing Championships to discuss all things wedding-planning and how she managed to create the perfect dress.
"My thing was, I wanted a kind of a festival," she tells RTÉ.
"The music started just before the desserts came out and I hit the dance floor and I didn’t stop 'til Monday."
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Just back in the real world after the best weekend of my life with @padraig.mcl Ellie, @cmcl.music I put my phone away and Surrounded by all our friends and family, who we love to the ends of the earth, I kid you not, we laughed and danced non stop for 3 days!! So many people helped us bring our ideas to life...To every single member of staff @kilkeacastle I cannot thank you enough. Your service, food and attention to detail was amazing. To @umitkutluk for working with me to make the dress of my dreams @iamlaurakinsella for my unreal headpiece. To my beautiful friend @helencodydublin For making Ellie look like an angel and making my evening dress to dance the night away. Tara Faye @xenaproductions there are no words. For anyone planning a wedding, this woman is, without doubt, the best! To my brilliant friend Anna @flowersmadeeasy I’ve never seen a room like it To Shane @aspect.photography who is an absolute legend and a total gent. I came across His work on Insta and I loved how personal, funny and interesting all his shots are. I’ll share some more here but for now I need to catch up on 36 hours sleep. Over and out #loveisallyouneed
Speaking about the gown, Kathryn revealed that her dress was custom made by Irish-based designer Umit Kutluk.
Thomas said that, above everything else, she knew she wanted a statement back
"Anytime I’m at a wedding, I love looking at the back of a bride’s dress. I’d seen this photograph, maybe four or five years ago, of a couture Chanel dress and it had that big sort of oversized bow," she told Ray.
"I brought him the photograph and he said, you know I don’t think we can make that. It took a long time to get it right, but we got it. I loved it. I felt really comfortable and I felt really confident on the day."
The custom made dress turned heads with its deep V at the back, created by folds of ivory silk meeting just below the small of her back in an oversized bow.
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“A wedding dress is both intimate and personal for a woman- it must reflect her personality and style” Carolina Herrera Myself and @umitkutluk went on quite the journey with this dress. I have never felt more beautiful. He turned my ideas into reality ❤️ @iamlaurakinsella created a simple, elegant and modern headpiece which completed the whole look The talent we have in this country is phenomenal and I’m so proud to #supportirish #irishdesign #irishfashion #irishweddings @kilkeacastle @aspect.photography @xenaproductions