Windsor | Windsor Castle | Windsor, Ontario | Windsor, Berkshire | Catherine, Duchess of Cambridge | Sarah, Duchess of York | Camilla, Duchess of Cornwall | University of Windsor | The Merry Wives of Windsor | Marie Louise, Duchess of Parma | Princess Louise, Duchess of Argyll | Duchess of Cambridge | Windsor Park | Sarah Lennox, Duchess of Richmond and Lennox | Duchess of York | Duchess of Kent | Windsor, Nova Scotia | Windsor Great Park | St George's Chapel at Windsor Castle | Maria Teresa, Grand Duchess of Luxembourg | Duchess of Cornwall | Duchess Charlotte Georgine of Mecklenburg-Strelitz | Catherine of Brunswick-Wolfenbüttel, Duchess of Saxe-Lauenburg | Barry Windsor-Smith | Princess Madeleine, Duchess of Hälsingland and Gästrikland | Princess Alice, Duchess of Gloucester | Natalia Grosvenor, Duchess of Westminster | Maria Vladimirovna, Grand Duchess of Russia | Georgiana Cavendish, Duchess of Devonshire | Windsor Davies |
Since then, her creations have been worn by some of the most famous women in the world such as Sofia Loren, Elizabeth Taylor, Lee Radzwill, Jacqueline Kennedy Onassis, Ira von Fürstenberg, Queen Paola of Belgium, Queen Anne-Marie of Greece, Marie-Hélène de Rothschild, Duchess of Windsor, Soraya Esfandiary-Bakhtiari, Merle Oberon, Audrey Hepburn, Marella Agnelli, Greta Garbo, Catherine Spaak, Pamela Churchill Harriman and Claudia Cardinale.
Seawell also took photos of other public figures such as President Lyndon B. Johnson and the Duke and Duchess of Windsor, as well as photos for album covers for well-known singers such as Johnny Mathis and Peggy Lee.
His famous clients, alongside the Duchess of Windsor, included Cher and Jacqueline Kennedy Onassis.
After a second marriage, to Ernest Simpson, and a subsequent divorce, Wallis Spencer married the former King Edward VIII of the United Kingdom and became the Duchess of Windsor.
Wallis Warfield Simpson, who subsequently married the former King Edward VIII and became known as Her Grace the Duchess of Windsor.