The pair watched the start of the Ladies’ Singles Semi-Final matches on centre court today.
The royal wore a £340 Self Portrait dress, a brand loved by other royals including Meghan Markle.
The dress is the white polka-dot taffeta midi dress and is available at Harvey Nichols.
The brand says of the flirty, summery gown: “Self-Portrait’s white midi dress reinterprets retro styling for the modern event wardrobe.
“Artfully balancing proportions, this polka-dot design is tailored from crisp taffeta to feature a gathered bust, puff sleeves and a playfully flared hem panel.”
This marks Beatrice’s first public outing while pregnant.
She and her husband Edoardo married last year, during lockdown.
While this will be her first baby, her husband has a son, Wolfie, from a previous relationship.