Elordi, 23, took to Instagram Stories, posting a photo of Zendaya in character as Rue on Euphoria. "Congratulations captain. Bravo," the Australian actor wrote on the photo, along with two heart emojis.
Meanwhile, Zendaya's other co-stars, including Storm Reid, Hunter Schafer, Maude Apatow and Barbie Ferreira, also shared their joy for the actress on social media.
"Let's go!" Reid enthused, in a video posted on Instagram. "I'm so proud of her. I'm so excited. Oh my god! Congratulations Z, I love you."
After the win, Zendaya told ET she was at a loss for the right words to describe the honor.
"I don't even know how to describe how I feel right now," she said. "I'm incredibly grateful and honored. Just to have my family here, and that love and that support in this room meant so much to me -- to be able to share this moment with all of them. I'm just happy and grateful and ... a lot of emotions happening. The stressful part is over."
See more from ET's post-Emmys interview with Zendaya below.