The Duchess also created a stunning bouquet of flowers alongside British television presenter and florist Alan Titchmarsh, who did the flowers for the Duke and Duchess of Cambridge’s wedding in 2011.
The TV gardener and Camilla were seen arranging flowers with representatives from Floral Angels - a charity Camilla is patron of.
The organisation turns unwanted flowers into gifts for homeless and domestic violence shelters and hospice.
Camilla's royal outing comes just one day after she attended the Royal Ascot.
Appearing in good spirits at the event alongside new husband Prince Harry, Meghan turned up at the event in a horse-drawn carriage smiling and waving to fans.
Once in the event, Meghan was stopped by Camilla, and the two appeared to exchange a series of tense words.
It's unclear what the two were talking about, but promptly after speaking, Meghan was instructed to follow behind Prince Charles and Camilla.