Peter Stefanovic shares adorable moment his son Oscar takes his first steps

They grow up so fast!

Peter Stefanovic shared the sweetest video of his baby boy Oscar taking his first steps.

Stefanovic, who is currently expecting a second child with wife Sylvia Jeffreys, 34, took to Instagram with a video of Oscar excitedly walking in their living room. He waves his hands in the air and falls onto the floor shortly after. Watch above.

On February 1, Oscar recently celebrated his first birthday.

"Happy first birthday to our big little boy. You colour our world. Love you mate," Stefanovic captioned some images from the birthday party.

Jeffreys is due to give birth to their new addition in two months.

"When you find out you're getting a best bud for life. Oscar's little brother due in April next year," the Nine journalist announced in October last year. "We are so lucky."

The couple, who tied the knot in 2018, welcomed Oscar in February 2020.

Jeffreys previously revealed Oscar was conceived via IVF, however, it isn't known if her second pregnancy is the result of fertility treatment.

RELATED: Sylvia Jeffreys touches on IVF experience: 'So much goes into a successful embryo'

"I know from my own personal experience of IVF that so much goes into having a successful embryo and having something sitting there that gives you the opportunity to make life for your family," she said, tearing up as she spoke on the Today show recently.

"There's such an emotional attachment to those embryos, long before they become the baby or the child that you grow to love."