Justin Timberlake has shared the first picture of his baby son. The 'Mirrors' singer and wife Jessica Biel recently welcomed their first child, Silas Randall, into the world and the singer has already passed his passion for sport onto the little boy, posting a picture of him wearing a Memphis Grizzlies jersey. Justin captioned the Instagram picture: "The Timberlakes are ready!!! GO GRIZZ! #GritNGrind #Playoffs #BabyGrizzROAR.(sic)" It was recently revealed the 'Not a Bad Thing' hitmaker is "so excited" about being a parent. A source said: "Justin is so excited, he doesn't know what to do with himself!" Jessica is also over the moon about their new arrival. The insider added: "Jessica sees herself as a mom of boys, so it worked out perfectly."