Rooney MaraandJoaquin Phoenixare parents!

The celeb couple are notoriously private and didn’t announce the news themselves.

Kossakovsky revealed the baby’s arrival at the 2020 Zurich Film Festival on September 27 (viaPeople).

Rooney Mara and Joaquin Phoenix

“He just got a baby by the way,” said Kossakovsky.

The director also revealed the special name that Mara and Phoenix chose for their first child.

Kossakovsky said that the actors welcomed “a beautiful son called River.”

River Phoenix

The name has a special meaning beyond sounding lovely and being trendy, though.

Sadly, his life was cut short when he died of a drug overdose in 1993.

He was only 23 years old.

Decades after his death, the Phoenix family still grieves their loss.