Alexander McQueen designer Sarah Burton brought together just enough modern accents with a whimsical nod to the past for the Duchess's dress. Inspired by Victorian fashion, which is a trademark of McQueen's work, the gown had a sophisticated elegance. The overall shape of the dress, use of lace, and other details made it demure and classic and very in line with what you'd expect in a royal wedding.
Similar lace patterns, sleeves, or gloves could be a possible way for Meghan to pay homage to Kate's look.