In the photo, wife Jessica Biel, 33, is cuddling their boy:
The caption: “The Timberlakes are ready!!! GO GRIZZ! #GritNGrind #Playoffs #BabyGrizzROAR.”
Timberlake, 34, and Biel welcomed their first child together a week ago. According to US Weekly, the couple plans to raise Silas in Montana.
Photo: Getty (top) and Justin Timberlake/Instagram (bottom)