According to The Sun, the couple's ceremony reverend Nick Wynne-Jones touched on Kate's illustration, saying it was a "lovely piece."
The publication added that Pippa's new husband also gave thanks to her unique contribution in his reception speech.
He said: “And to Pippa’s sister Kate, such ability – a beautiful drawing of St Mark’s church in the order of service."
James also praised the Duchess for her reading and her children's contribution to the bridal party.
“A flawless reading and a kind loan of two adorable little ones," he added.