The dad-of-two – whose wife Ayda Field gave birth to their baby son on Monday evening – revealed their new addition's name in the only way he knows how.
Just as he vlogged his wife in labour, he decided to keep his fans amused with another hilarious video.
In the 23-second clip, we see Ayda and Robbie's roles reversed, as his loyal wife dutifully pushes him and their newborn son out of the hospital in a wheelchair.
At the end of the corridor, the 40-year-old instructs the actress to take a right - causing a lot of huffing and puffing.
Which is fair enough, as she was just in labour!
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Eventually the camera spins round to show the ex-Take That singer cradling his baby boy - with a wealth of love on his face.
Posting the video on Twitter, the Robster wrote: "Charlton Valentine Williams has left the building...and Daddy is doing just fine. RW x"
The name Charlton, according to SheKnows, is derived from a surname and means "people with this name have a deep inner need for quiet, and a desire to understand and analyse the world they live in, and to learn the deeper truths."
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Valentine, they add, is a name meaning "strong" and is suited to people with a "deep inner desire for love and companionship".
What a gorgeous choice for Robbie and Ayda's little boy - and little Teddy Rose's baby brother!