United Kingdom, Sept. 1 -- Vogue Williams and Spencer Matthews have welcomed their fourth child into the world.

The 40-year-old model and the 38-year-old TV personality announced the birth of their baby boy on Instagram on Tuesday night (01.09.26).

She posted a sweet shot of herself cradling the newborn as their three other children, sons Theodore, seven, and Otto, four, and their daughter Gigi, six, gathered around her, with the caption: "Our beautiful baby boy has arrived safely.

"The house is bursting with excitement, love and happiness and we couldn't be more delighted."

Fans flooded the post's comments section with congratulatory messages, as one reacted: "So thrilled for you guys and proud as punch, you are the best parents!

"L...