"4 years ago, today, she came in to this world," he wrote in the caption. "And changed my life forever."
So sweet! Of course, while Ackles has not even been active on the photo-sharing app for a full two years yet, this is far from the first time the dad-of-three has showcased his precious posse. In fact, we can't get enough of the seriously cute shots he shares of himself with his kiddos.
Like this one, which he posted for Father's Day:
"A fathers work is never done," he captioned of the sweet image of JJ zero-ing in on his face with a tube of lipstick. "Happy Daddy Day to all you men out there that handle your business. Even getting makeup applied. That's the good stuff."
What a good sport!
Then there was the shot of Ackles with his 6-month-old twins Zeppelin and Arrow, which showed him doing some serious multi-tasking:
"When the remote control is right between your legs and you can't change the channel #twins," he wrote.
The actor and director—who you may also recognize from his turn as Eric Brady on "Day of Our Lives"—also posted this sweet throwback:
"Found this from a year ago," he explained. "She thinks we're just having fun but I'm secretly teaching her some classic WWE moves."
And this adorable family shot that includes wife Danneel:
Aww! This fam is totally #goals. Though we still think there's one hashtag missing from all of these posts: #ManCrushMonday.