The name is a tribute to the Joker star’s older brother, who died aged 23 in 1993.
Rooney and Phoenix baby
Documentary film director Victor Kossakovsky revealed the news about the couple’s baby.
He spoke about it at the Zurich Film Festival on September 27. This followed a screening of the documentary Gunda which Joaquin Phoenix executive produced.
‘A beautiful son’
During the Q&A, Kossakovy apoologized for Phoenix’s absence.
He said: “[Joaquin] just had a baby, by the way, his name was… a beautiful son called River, so he cannot promote [the film] right now.”
Expecting a baby
The news that the couple were expecting a baby first circulated in May. Celebrity news site Page Six cited a source who said Rooney Mara ‘may be as far as six months along in her pregnancy’.
Photos published by some outlets show Mara wearing baggy clothes. Some speculated that this could be to ‘cover her bump’.
Page Six reported that the couple – who often engage in vegan advocacy together and separately – first met in 2013, on the set of Spike Jonze film Her, andbegan dating in 2018 after acting together in the movie Mary Magdalene.