Not only did Harry fly to Utah to attend the premiere, but he freely admitted that he shed a few tears while watching the movie, which Zach wrote, directed, and starred in.
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Harry is apparently Zach's guest at the film festival, and after the unveiling, the friends went on to pop-up club The Grey Goose Blue Door with Zach's girlfriend Taylor Bagley to toast the new project.
The British pop star was spotted talking to Anne Hathaway at the afterparty.
Wish I Was Here stars Zach as Aiden Bloom, a LA-based actor struggling to get his career off the ground.
Kate Hudson plays his supportive wife, who works a boring data entry job so her husband can persue his dream. But the pair's lives are turned upside down when Aiden's father is diagnosed with cancer.