Penn Badgley, best-known as the lead of Netflix series 'You', has welcomed a baby boy with wife Domino Kirke.

This is the 'You' star's first child.

Kirke also has a son, Cassius (whose father is musician Morgan O'Kane), who Badgley is stepfather to.

The couple announced the birth of their child via Instagram.

Kirke, a singer and doula, shared a picture of the placenta printed on a piece of paper.

She revealed the baby was born 40 days ago as she captioned the picture: "His heart shaped home ❣️ #40dayspostpartum."

https://www.instagram.com/p/CFX6apxFFeR/

Domino Kirke and Penn Badgley began dating in 2014. They tied the knot in 2017.

They previously revealed that they had endured "two miscarriages in a row" before their baby's arrival.

Penn Badgley's credits over the years have included 'The Brothers Garcia', 'Gossip Girl', 'John Tucker Must Die', and 'Easy A'. He is also the lead singer of indie band MOTHXR.

However, since 'You' became a smash hit on Netflix in 2018, he's become synonymous with its protagonist, Joe Goldberg.

There have been two seasons so far and it's been renewed for a third.

New episodes are expected to arrive sometime in 2021 with Badgley and Victoria Pedretti, who plays Love, reprising their roles.