Alex Wong (Season 7): Though the ballet dancer was a favorite to win his season of So You Think You Can Dance, Wong suffered an injury to his Achilles tendon and had to withdraw from the show. His journey wasn’t over, however, as he regularly returned in following seasons as an all-star to partner with the new contestants.
Melanie Moore (Season 8): Moore, a contemporary dancer, handily won the dance competition in her season and went on to multiple roles on Broadway. One of Jourdan Epstein’s behind-the-scenes posts from In the Heights filming shows part of a dance number Moore was in that was cut from the final version of the film.
Virgil Gadson (Season 12): For its 12th season, So You Think You Can Dance split its contestants into Stage vs. Street, rather than male and female. Hip-hop dancer Gadson, a member of Team Street, placed third overall.
Kate Harpootlian (Season 12): A member of Team Stage in Season 12, contemporary dancer Harpootlian was eliminated after Week 4.
Source : https://www.cinemablend.com/news/2569162/in-the-heights-so-you-think-you-can-dance-dancers-who-appeared-in-the-movie208