The former Posh Spice shared a photo of the flowers and the sweet message via Instagram.
"Good luck! We love you," the card read, and was signed with David's name as well as Brooklyn, Romeo, Cruz and Harper's names.
While Victoria prepped the show, David was out and about in New York entertaining and educating the kids at the Natural History Museum.
"Nice day in NYC & a great few hours at the Natural History Museum," the 41-year-old former soccer pro captioned a family selfie he shared to Instagram. “"Keeping the littlest ones busy whilst mum works on the collection..."