New dad Justin Timberlake has shared the first snap of his baby boy Silas just one week after announcing his arrival. The singer and his actress wife Jessica Biel welcomed their new son last week, and on Sunday, the pop star proudly showed off their bundle of joy on Instagram.com. Capturing a beaming Biel cradling the infant, who is sporting a tiny jersey featuring his dad’s hometown basketball team, the Memphis Grizzlies, the sports mad pop star added the caption, “The Timberlakes are ready!!! GO GRIZZ! #GritNGrind #Playoffs #BabyGrizzROAR.”