The actor's wife Genevieve revealed the tiny tot's name via Twitter on Tuesday night (21 January), when she uploaded a cute photo of Jared holding his very sleepy baby.
She added the caption: "@jarpad and Shepherd watching some late night #supernatural."
Unsurprisingly, the couple were swiftly indundated with messages from fans commenting on just how sweet the father-son moment was.
Jared and Genevieve became parents for the second time just before Christmas. They are already parents to son Thomas, born March 2012.
Jared, who plays Sam Winchester in Supernatural, shared their happy baby news on 23 December, tweeting: ""My amazingly strong wife home-birthed a happy and healthy baby boy last night :). Please send love :))."
He married Genevieve in Sun Valley, Idaho in 2010. They met on the set of Supernatural where Genevieve played the demon Ruby in series four.
Last week, Jared joined his Supernatural co-star Jensen Ackles and Jensen's wife Danneel on the red carpet at the Critics' Choice Movie Awards in Los Angeles.
More celebrity babies coming! Stars who announced pregnancies in 2014:
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