Rachel Zegler is proving that at the end of the day, family is what matters most.ALSO: HELLO! launches Jubilee T-shirt collection to celebrate Queen Elizabeth in styleThe West Side Story star penned an emotional tribute to her family as they took part in a major milestone for their daughter, though she revealed that she unfortunately had to miss the special moment.The star's success and her family's support came full circle when they visited Disney World recently, and saw a display of none other than Rachel's very own dress she wore to portray the iconic María Vázquez in the Steven Spielberg musical.WATCH: The trailer for West Side StoryMORE: West Side Story star Rachel Zegler updates fans after Oscars invite snubShe shared a heartfelt shot of her parents admiring the classic, frilly white dress with a red belt as it was presented behind a glass casing.The 21-year-old wrote: "My parents saw my costume from West Side Story on display at Walt Disney World today," and she revealed why it was extra meaningful, explaining that Disney was: "A place they took me every year as a kid that truly helped me cultivate my dreams."Though she couldn't be next to them for the sentimental moment, the reason was undoubtedly worth it, and she went on to reveal an exciting career update.