The moment was only topped when the duo confirmed they were expecting their first biological child together.

Two of Hollywood’s hottest stars combining genes?

Yes, just.Shiloh Jolie-Pittwas born in May 2006, joining her adopted siblings Maddox and Zahara.

Knox Jolie-Pitt with braces grin

Usually lithe and lean, Jolie’s abdomen was swollen with not one but two offspring in the making.

Having adopted Pax in 2007, Hollywood’s most-watched brood was growing by leaps and bounds.

“We weren’t expecting twins!”

Angelina Jolie, Knox and Vivienne

Jolie revealed toEntertainment Weekly.

“So it did shock us, and we jumped to six quickly.

But we like a challenge.”

Vivienne, Pax, and Knox laughing

That challenge began in a small town in southern France when the Jolie-Pitt fraternal twins entered the world.

Vivienne Marcheline and her brother Knox Leon were born in July 2008.

Hillhouse passed away in 1976, when Pitt was 13 years old.

It’s been reported the name hails from Jolie’s great grandfather on her mother Micheline’s side.

While Jolie and Pitt didn’t invent their son’s name, they certainly contributed to its popularity.