Everyone is talking about the Royal Wedding. Everyone. But what better person to opine on the glamour and fashion of the majestic marriage between Prince William and Kate Middleton than La Jollan Zandra Rhodes, an internationally known fashion designer who has experience designing dresses for none other than the late Diana, Princess of Wales. Not to mention, her star-studded client list also includes Jackie Onassis, Elizabeth Taylor and Freddie Mercury of the rock group Queen. But this past week, Rhodes was in London, where she headed after appearing for “Brit-Week” at the Neiman Marcus in Beverly Hills. She said she watched the Royal Wedding on TV at a party with friends, and her main take on the event is that it was “an affair of the hat.” “You are more aware of the hats than anything else, besides the beautiful bride and her dress, of course,” she said in a May 3 telephone interview from Seattle, where she is working on costumes for the “Magic Flute” opera. Rhodes’ designs were also featured last month in La Jollan John Malashock’s acclaimed production of “The Floating World.” Rhodes designed about a dozen dresses for Princess Di in the 1980s, she said, her most notable being a pale pink off-shoulder dress that was worn with pearls when the princess was pregnant. She said it was a a “beautiful, classic dress, something that could have belonged to Grace Kelly.” She said she was honored to have been commissioned to make dresses for Diana, who she said “did the job well, and wore her clothes well.”