Katie, who is mum to five children, posted the sweet snap of her boy on her You Gossip page last night (3 March) after making him chuckle.
Jett, who she welcomed into the world with husband Kieran Hayler in August 2013, is pulling one almighty grin in the picture while enjoying a bath before bedtime.
Commenting on the photo, Katie told her followers: "At least my gorgeous Jett finds me funny :))."
Celebrity Big Brother winner Katie has been giving fans a good sneak peek at family life over the past week, having recently renewed her wedding vows with former stripper Kieran.
On Saturday (28 February), Katie was pictured with Kieran and her eldest son Harvey as they larked around at home together.
Since then, Katie has also tweeted a cute picture of youngest child, baby daughter Bunny, peeking out of her cot.
Keep 'em coming, Katie!
Former glamour model Katie renewed her vows with Kieran in West Sussex last month, following a rocky year of ups and downs together.
Last night, Katie also gave fans a glimpse of their big day by sharing a new photo of the yummy cupcakes they fed to guests.
Katie Price: All you need to know in less than two minutes!