The off-the-shoulder gown has lace sleeves ... And when she finally does step out in her own wedding dress, it's a simple white gown with a V-neckline and a loose A-line silhouette.

Getty Images Say yes to the dress ... wore an off-the-shoulder blush pink midi with cream open-toe sandals, while the fashion and jewelry designer was clad in a white and peach floral short ...

Thelma, who is best known for her appearances on the Channel 4 series, picked an all-white dress, with fur trimmings, that matched her 20-year-old daughter Katrina Armstrong's off-shoulder ensemble.