Shadowhunters' Katherine McNamara Isn't Spilling Any Secrets About Sarah Hyland's Guest Role

We are so stoked about Sarah Hyland‘s guest star role on Shadowhunters!

However, we just can’t seem to get anything more about her role — not even from star Katherine McNamara.

“I’m sorry. I want to tell you, I really do! But they’ll kill me,” she shared with ET. “You guys are going to be so happy. I cannot wait for you to see this.”

However, Kat is so happy that Sarah will officially be a part of the show.

“We’ve [the cast have] been keeping that so secret for so long. It’s been so hard,” Kat added. “I’m really proud of us because we’ve all been so excited about it and it’s been really hard to keep it secret.”

“She’s been a part of this family since day one, and so having her on this show was only natural.”