If that wasn't enough to see the baby shower earn A-list points, Haute Chefs LA provided a "quintessentially Californian" lunch spread with plant-based appetisers, market vegetables and salads.
Not everything was fit for the adults however, as a wand-making station and gift bags kept the children entertained.
Dewan's actor husband proposed at the event and the couple shared the news via their Instagram pages alongside a photograph of them sharing a kiss - with the oval engagement ring on full display.
Over on Dewan's page, the 39-year-old captioned the image, "A lifetime to love and grow with you... you have my heart."
While her fiancé also shared the photograph alongside the touching words: "When you wake in the morning I will kiss your face with a smile no one has ever seen."
"When you wake in the morning I will kiss your eyes and say it's you I have loved all these years."
The soon-to-be newlyweds first began dating back in October 2018 following Dewan's split from Channing Tatum after nine years of marriage.
Last September, the pair announced that they are expecting their first child together.
"We are beyond overjoyed and couldn't be happier to be expanding our family!" the couple told People magazine.
Dewan is already mother to six-year-old daughter, Everly Tatum, whom she shares with Channing.