"Mummy getting ready for Beyoncé in Milan tonight," the doting dad captioned the pic.
The adorable trio have been keeping fans up-to-date with their Italian adventures on Instagram.
Chrissy shared a sweet selfie of the pair when they stopped by Lake Como, where they took their first holiday together and where they eventually tied the knot.
"Back to where it all began - Lake Como, Italy - first came here in 2007. A boat tour guide took us to a little spot on the lake and told us to make a wish. I asked for this to be the man I marry and have children with. I think John asked for the most perfect bite of cacio e pepe. Both came true, and here we are."