Back to business for Kate Middleton as she stuns in €1,700 dress after Pippa's wedding extravaganza

The Duchess of Cambridge returned to her royal duties on Monday for a visit to the Chelsea Flower Show, just one day after her younger sister Pippa's lavish wedding celebrations concluded.

Kate (35), wearing a floral green midi dress by Rochas which has since sold out, looked fresh as ever as she met with featured exhibitors and members of the with Royal Horticultural Society (RHS), less than a day after Pippa's €1mwedding party wrapped in the early hours of Sunday morning.

While Prince George and Princess Charlotte, who were bridesmaid and pageboy on Saturday at the service, headed to bed early as expected, the 300 guests in attendance at the reception hosted at the Middleton family's €6m home in Bucklebury didn't wrap up proceedings until 4am.

She didn't play an official role, but it was clear Kate was acting maid of honour as she was by her sister's side on her big day and gave a subtle gift of support - reportedly sketching the picture of St. Mark's Church that appeared on the cover of the couple's service programmes.

Reverend Nick Wynne-Jones, who led proceedings, said it was a "lovely piece" and groom James gushed over his new sister-in-law's talents in his wedding speech “And to Pippa’s sister Kate, such ability – a beautiful drawing of St Mark’s church in the order of service."

As usual, the flower show was a rather royal affair with Kate's grandmother-in-law, Britain's Queen Elizabeth in attendance with her husband Prince Philip, as well as Princesses Eugenie and Beatrice and Sophie, Countess of Wessex.

Meanwhile, Pippa and her new husband James Matthews are enjoying some downtime as they jetted off on their honeymoon on Monday to a tiny Hawaii island once owned by late Hollywood icon Marlon Brando.

Their destination was Tetiaroa, a tiny paradise atol thousands of miles south of Hawaii which was once a summer residence for the chiefs and kings of Tahiti.