Rain Phoenix honored her late brother River Phoenix on what would have been his 54th birthday by sharing an emotional tribute on Instagram. The post included a series of nostalgic photos and quotes from River, emphasizing his dedication to humanitarian causes such as environmentalism and LGBTQ+ rights. River, who tragically died from a drug overdose at the age of 23, was remembered fondly by friends and family, including Flea from the Red Hot Chili Peppers, who was with him on the night of his death. Rain's heartfelt caption read, 'Happy Birthday River,' reflecting the enduring impact of his legacy. River was a talented actor known for roles in films like 'Stand By Me' and 'My Own Private Idaho.' His passing continues to resonate with his family and fans, who remember him as a gifted artist and compassionate individual.