The “Can’t Stop the Feeling” singer posted a photo of Biel and their 1-year-old son, Silas, that featured the actress holding her baby boy over her shoulder and hoisting him up to reveal a flap on his onesie with the words "I heart Mom" written on it.
Timberlake's cheeky caption read: "M.I.L.F. Alert!!!! Happy Mother's Day to this AMAZING MOM AND WIFE. And, to all of the Mother's out there... You keep the World turning!! Hope every single one of you has an amazing day!"
Biel also posted the same photo and gave a shout-out to her own mother. "Happy Mother's Day to you, Mom. I only, just now, understand what you did for me," she wrote in the caption. "And to all moms everywhere, I'm having a champagne in your honor. And when I say champagne I mean seltzer water cause mama's gotta do carpool in the a.m. #momlife."
If the photo seems familiar, it's because Silas's look is a doppelgänger for the one he wore to celebrate Father's Day last year, when his dad struck a very similar pose to his wife's to show off the baby's "I heart Dad" sleepsuit. Well, it's only fair.
Can this family get any cuter?