Tom Welling has welcomed his second child into the world.

Rocklin, Thomson and Jessica (c) Instagram

Rocklin, Thomson and Jessica (c) Instagram

The 'Smallville' actor's wife Jessica Rose Lee gave birth to their son named Rocklin Von on Sunday (06.06.21).

Jessica - who also has two-year-old son Thomson Wylde with Tom - took to her Instagram Stories to share a series of sweet snaps of the newborn.

The pictures include one of Thomson and the mother-of-two's hands on the little bundle's tummy, which she also posted on her main feed with the caption: "Rocklin Von, welcome to your family."

In the comments section, Tom commented: "Pure joy."

The 44-year-old actor initially played it coy when questioned on news his wife Jessica was pregnant with a sibling for Thomson.

Tom appeared on his former 'Smallville' co-star Michael Rosenbaum's 'Inside of You' podcast earlier this year, and when the host brought up the news he'd got a baby on the way, to which he replied: "What? I do?"

Michael reassured him he had heard the news from Jessica herself, prompting Tom to call his wife to confirm.

Michael joked: "You lying b******! But you do! You have another one coming!"

While he was reluctant to share any details about the new arrival he heaped praise on his "hilarious" son.

He told Michael: "He's a good, cute, funny kid. He makes me laugh all the time."

The former 'Lucifer' star and his wife celebrated Thomson's second birthday in January with a "barn party", with Jessica branding the tot a "full moon horse lover".

Sharing details of the celebration on Instagram, she wrote: "Raising Sweet T amongst Mother Nature and her precious gifts instills lessons and meanings to life unspoken. This is my wish for all of Earth’s children – The chance for Mother Nature to be the teacher.”

Tom and Jessica tied the knot in November 2019 after five years together.