"My partner in this thang called life... you are the most wonderful human I have ever met," Timberlake, 38, captioned the selection of adorably romantic pics. "You make me smile, laugh, and love life more than I knew I could. I cherish every moment with you and can’t wait to spend so many more years doing the same... but, new."
"Happy Birthday, you GOD OF ALL SMOKE SHOWS!!" Timberlake added. "Love, Your Huz."
The series of swoon-worthy snaps included a sweet, simple selfie showing Biel gently pecking her hubby on the cheek, the dynamic duo posed romantically in front of a rustic fireplace while decked out in plaid pajamas, and a black-and-white car selfie Biel snapped of Timberlake as he drove them around town.
One of the pics also appeared to be from Timberlake's Saturday Night Live dressing room from 2013, when the singer served as the show's host and starred as the Roman emperor Caligula in one of the sketches. In the pic, Timberlake is in full ancient garb as Biel jokingly gropes his Roman loincloth.