The global superstar, 34, posted a Christmas message to his 50.7million Twitter followers and described his son as the "greatest gift".
The actor and singer can be seen looking adoringly at his only son Silas, who wife Jessica Biel gave birth to in April.
Enjoying his first Christmas as a Daddy, Justin can be seen wearing a black and white striped beanie hat as he snuggles his eight-month-old son who is wearing a red hoodie.
Justin wrote: "This life... Truly the GREATEST gift ever. Hoping you are spending time with the ones you cherish and remembering that we are ALL family. Sending love from ours to yours. Merry Christmas, everyone!! --J and J and S."
Fans responded with appropriate messages of "awwww" and "cute", with one joking: "Yeaaaaah even my cold icy ovaries warmed at this."
Another said: "What a wonderful dad. Have good days."
The last time Justin shared a snap of his beloved son was in September, when he called fatherhood "Insanely amazing".
Before that, he posted a picture of the cutie asleep on his chest to mark Father's Day in June.
Such an adorable family!
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