The "Mad Men" alum took to Instagram on Tuesday to share one hilarious throwback photo of herself as a child in celebration of her 38th birthday.
In the vintage snapshot, Jones has a big smile on her face as her signature blonde locks are styled in an adorable bowl cut.
"ANNOUNCEMENT: on this day of my birth I would like to declare that I refuse to grow up, and that I'd like life to stop making me try," she posted with the cute candid. "Instead I'm going to feel emotions deeply, have tantrums when I feel life unfair, not always do things in moderation, and make a big mess sometimes.. I want to run with abandon and laugh until I breathe in gasps, I will love unconditionally and sometimes be afraid of the dark."
"I was once told that you are as old as you feel, so if that's true, Mom& Dad I'm gonna need this sweater back. Thanks for all the love. JJ," she added.
We love that January still feels like a kid a heart-- what do you think about her adorable photo and birthday post? Tell toofab in the comment section below and check out the gallery above to see more stars before the fame!