To all the dads out there, including mine, who selflessly give their time and love to their families, I appreciate and salute you. And to my beloved husband, my adventure companion, my road dog, who works tirelessly for THIS family and gives of himself energetically and spiritually every day, I am eternally grateful for you and your love," she wrote on Instagram.
"As Silas likes to say, 'you are so much cool.' I love you to the moon and back. Your adoring wife, Me."
Meanwhile, Timberlake also shared some pictures with a lovely message to the social media site.
"These 2 angels... The greatest gift I've ever known. And, the reason I won't EVER STOP! Happy Fathers Day to all the Dads out there! Hope you are enjoying!
#Howearlyistooearlyforafathersdaybeer," the 36-year-old wrote alongside the family collage.
Biel, 35, and Timberlake have been married since 2012.