A Manhattan appeals court stopped construction on a $130 million park project dubbed “Hollywood on the Hudson,” which is being funded by media exec Barry Diller.

Workers were to install pilings at the West 13th Street development over dilapidated Pier 55 on July 5 after a lower-court judge approved the project in April.

Activists sued last year, saying construction would threaten marine life.

They appealed the April ruling, and on Thursday a five-judge panel halted the project until at least September while it reviews the lower-court decision.