Josey DorseyIt is returning to school.

Ryan Dorsey celebrated the latest milestone of his 6-year-old son—whose mom is the late Naya Rivera—with the sweetest social media post.

Dear Summer, what happened? He wrote the above Instagram post on August 23. “Kindergarten has ended. Now, we are in the first grade!

It Big SkyThe actor applauded the “big boy” and said, “I Love You so Much.”

Naya’s ex-husband Glee co-star Jenna Ushkowitz later commented on the post with a red heart emoji.

Two months earlier, Ryan, 39, celebrated with Josey at his kingergarden graduation and marveled at just how fast their son is growing up.

“Can’t believe that it is official. [peace sign emoji]Out Kindergarten !!!” In a June Instagram posting, he shared his thoughts and photos from the day. He wrote, “My baby boy’s on the way to 1st Grade!”