That was fast!

Over the weekend Justin Timberlake posted the adorable shot of his wife Jessica Biel and their newborn son Silas, and we can't believe how tiny he is -- and how amazing Jessica looks! And though the couple have been pretty notorious for keeping the details of their personal lives out of the media, it seems like they couldn't wait to upload this sweet snapshot!

Silas is already wearing a Memphis Grizzles jersey, and JT captioned the pic, "The Timberlakes are ready!!! GO GRIZZ! #GritNGrind #Playoffs #BabyGrizzROAR." Um, #toocute!

Jessica and Justin welcomed the tiny tyke earlier this month, and last week it was reported that the proud parents plan to raise their little boy in Big Sky, Montana. "Their house is all set up for the baby," the insider tells Us Weekly. "They want to raise him out of the spotlight." Another source added that "Jessica is happiest when she's in the mountains."

We're guessing we'll be seeing more pics of this beautiful family though!