"Happy BAE-DAY, baby!! I can't put into words what you mean to me," Timberlake wrote, captioning a cute pic of him kissing his wife's cheek. "You are the GREATEST Mommy and Wife a man could ever ask for. I love you to the MOON AND BACK!!!"
Timberlake and Biel tied the knot in 2012 at a romantic ceremony in Fasano, Italy. The couple then welcomed their son, Silas Randall, in April 2015.
Biel opened up to ET in an exclusive sit-down at her new restaurant, Au Fudge, about what an ideal date for her and her handsome husband would be, sharing, "I kind of like an old-fashioned date -- dinner, movie, make out. That's like a great date!"