We're taking a look at the rest of their sweetest snaps, from working the red carpet to riding bikes.
Scroll through to see their love through the years, and don't forget to check out even more adorable celebrity couples!
To honor JT's special day, we're taking a look back at all of his high-profile romances.
Let's just say he had a lot of practice in the relationship field before putting a ring on Jessica Biel's finger!
Justin Timberlake and Jessica Biel had a beautiful October wedding in Italy in 2012 and welcomed their first child together, Silas, in April 2015, but their cute moments started way before either milestone.
Did Justin Timberlake really date Scarlett Johansson after his music video?
How long Jessica Biel remain as Justin Timberlake's wife?
From his childhood pal Britney Spears to saucy Cameron Diaz, Justin Timberlake's exes have been hot through and through as you can see on this list of women Justin Timberlake has dated.
Fans will also enjoy fun facts about the former N'Sync member and cute pics of young Justin Timberlake.