Sharing a photo of his date with Demi on Instagram, the L.A. based florist wrote, "In the glorious poppies at #RHSChelseaFlowerShow #Poppies".
The 53-year-old made a name for herself starring in the 80's classic St. Elmo's Fire and 1990 blockbuster Ghost.
The former Charlie's Angels Villain then put on a dazzling display at the Vogue 100 Festival in London, tastefully styling her grey locks to blend in with the rest of her hair. Other guests included Kim Kardashian West and Kate Moss.
Also in attendance at the Chelsea Flower Show was Queen Elizabeth II along with The Duke and Duchess of Cambridge. The Queen of England is pictured below next to a cut-out of her own head, filled with a colourful arrangement of flowers.
The arrangement was designed for the New Covent Garden Flower Market in London.