The ‘Stand By Me’ actor would have been 54 on Aug. 23.

River Phoenix’s sister Rain is remembering her late brother on what would have been his 54th birthday.

He was 23 years old.

River Phoenix pictured in 1988

River Phoenix pictured in 1988.George Rose/Getty

We’re all worth millions of planets and stars and galaxies."

She captioned the post simply, “Happy Birthday River,” punctuated with a blue heart.

Despite his youth, Phoenix was already an accomplished actor when he died.

His family has publicly remembered him before.

Stand By MedirectorRob Reineralso praised the late actor ina 2016 interviewwithEntertainment Weekly.

Phoenix’s death “shocked the hell out of me,” Reiner said.

I knew he wasn’t living in the best place.

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