They grow up so fast!

Kimora Lee Simmons recently posted a photo of her son Wolfe Lee Leissner to Instagram and everyone is gagging at how adorable he is.

Back in 2015, the former model and current mogul posted a photo of Wolfe as a newborn, and a little more than a year later, she's showing us just a little time can bring on so much change.

Take a look at her adorable baby boy with her husband Tim Leissner, below:

See Angela Simmons gush about her new bundle of joy in the BET Breaks video, above.