Joaquin Phoenix and Rooney Mara 'welcome a son'

Joaquin Phoenix and Rooney Mara have welcomed a baby boy into the world, and have named him River, after the Joker star's late brother, according to director Viktor Kossakovsky.

The director appeared to let the news slip at the 2020 Zurich film festival, while he was explaining Phoenix's absence from promotional duties for new film. Gunda.

"He just got a baby by the way ... A beautiful son called River", Kossakovsky was recorded saying.

Phoenix's older brother River died of a drug overdose in 1993 at the age of 23.

Phoenix and Mara, who became engaged in May last year. have not publicly confirmed the news,