The NFL superstar quarterback shared news of the milestone on Wednesday ... posting pics of the 1-year-old walking from daddy to mommy with a huge grin on his face.
"Win’s first steps!" Wilson tweeted.
Ciara had been documenting Win's progress recently -- just last week, she posted video on his 1st birthday ... saying they were still waiting on him to walk.
Now, it's off to the races for the little dude ... and it's just a matter of time 'til the kid starts running around and throwing the ball with dad.
Nice to see Russell bringing the fam to camp -- the 'hawks are currently 5 days into training -- and we'll see if Win's success brings wins for Seattle this upcoming season.