Holly Willoughby, 38, uploaded a picture of her son, Harry, nine, standing outside Emirates with his back towards the camera.
The This Morning presenter explained they had been at the stadium for a charity night.
Holly, who also shares daughter Belle, eight, and son Chester, four, with husband Dan Baldwin, thanked Arsenal players for their time.
She captioned the shot: “Harry… feeling truly inspired after the most wonderful night for the @arsenal_foundation #nighttoinspire.
“Thank you to all the players for their time and kind words….
She added: “Keep up the incredible work that the foundation does, making a huge difference to young people’s lives at home and across the globe.”
Arsenal Foundation replied: “What a picture! Thanks so much for your continued support, Holly! #NightToInspire.”
While one of her followers said: “Great photo Holly x.”
Another said: “Morning what a brilliant pic lucky boy.”
Holly has just returned to This Morning following an idyllic Easter break in the Maldives.
The TV favourite shared several snaps from her sun-soaked getaway to her Instagram.
One photo saw the star wearing a frilly summer dress whilst riding a bike, with her lean pins on display.
In another snap, Holly revealed she had bumped into pal Davina McCall on holiday, who ended up teaching her how to surf.
The mother-of-three posted a picture of the two of them standing next to surfboards, which she captioned: “And look who I bump into… such a surprise to get to spend some real time with @davinamccall…
“You are a total dream boat my kids adore you and seeing our two Chester’s together was just AMAZING!… thank you for taking me surfing… love ya!”
To follow up the upload, Holly posted an action shot of her and Davina hitting the waves.
Meanwhile, Britain’s Got Talent judge, Amanda Holden, revealed she had replace Holly on Celebrity Juice this week.
The 48-year-old uploaded a picture of herself wearing a sizzling red leather dress to announce her appearance on the ITV2 show.
In view of her one million followers, she said: “Finally caved and did @celebrityjuiceofficial #teamcaptain in @hollywilloughby absence #glam @itsdash @karl_willett.”
This Morning airs weekdays on ITV at 10.30am.