Joaquin Phoenix and Rooney Mara have reportedly welcomed their first child, and named him after River Phoenix

• Joaquin Phoenix and Rooney Mara reportedly welcomed a baby son, according to director Viktor Kossakovsky.
• Kossakovsky was promoting his new film "Gunda," which Phoenix is an executive producer on, at the Zurich Film Festival when he announced the news.
• "He just got a baby, by the way, his name was ... a beautiful son called River, so he cannot promote [the film] right now," Kossakovsky said.
• Phoenix and Mara's son is reportedly named after Phoenix's late brother, River, who died of a drug overdose in 1993 aged just 23.
• Phoenix and Mara have not confirmed the pregnancy or birth themselves, but Mara has been spotted with a baby bump in recent months and the two got engaged last year.

Joaquin Phoenix and Rooney Mara reportedly welcomed their new baby son, named after Phoenix's late brother River, a month ago — according to director Viktor Kossakovsky.

Kossakovsky revealed the news at the Zurich Film Festival, where he was premiering his new film "Gunda," which Phoenix is an executive producer on.

The director apologized for Phoenix's absence, and said: "He just got a baby, by the way, his name was ... a beautiful son called River, so he cannot promote [the film] right now."

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Phoenix and Mara, who met on the set of "Her" in 2013 and got engaged last year, have not confirmed the news. In fact, they have yet to even confirm the pregnancy, despite reports of the pregnancy being released in May.

This would be Phoenix and Mara's first child. The couple also starred together in 2018's "Mary Magdelene."

Kossakovsky told the audience at the Zurich Film Festival that Phoenix and Mara had named the baby after Phoenix's late brother River.

River Phoenix died of a drug overdose in 1993 aged just 23. He had a promising career ahead of him after starring roles in "Stand By Me," "Indiana Jones and the Last Crusade," and "My Own Private Idaho." He also earned an Oscar nomination for best supporting actor in 1988 for "Running on Empty."

Joaquin Phoenix won an Oscar earlier this year for "Joker" and included a tribute to River at the end of his speech. Phoenix said: "When he was 17, my brother wrote this lyric, he said: 'Run to the rescue with love and peace will follow.'"

In January, Phoenix opened up to Anderson Cooper on "60 Minutes" about River's death, and said his brother was the one who told him to get into acting. "He didn't ask me — he told me. And I am indebted to him for that because acting has given me such an incredible life."

Phoenix also said: "I feel like in virtually every movie that I made, there was a connection to River in some way. And I think that we've all felt his presence and guidance in our lives in numerous ways."

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