When the couple do choose to share a peek of their son with fan, they keep his face hidden, such as in their cute family snap of their Halloween costumes as Harley Quinn, Robin and Batman, a sweet 4th of July post and a sweet holiday snap of Justin and Silas jumping from a wharf this weekend.
Biel captioned the cute memory simply "Jumping off the dock of the bay..."
After five years of dating, the couple wed in 2012 and welcomed their son Silas in 2015.
After the birth of their son, Biel candidly took to Reddit to detail how motherhood has shaped her life, ad the impact that Timberlake has had on shifting her outlook on life.
"Honestly, I didn't grow up dreaming about having kids and having a family. I was so focused on my career and so focused on my selfish existence...but I think meeting my husband inspired me," she wrote. "One day I just woke up and knew it's what I wanted to do and it's been the hardest, greatest thing ever and I wouldn't give it up for the world."
With sweet comments like this, we are already looking forward to the next time they allow us a glimpse into their family life.