"That she's a sexy and confident woman. Everyone that is making a negative comment about my sister can back the f*** up because I WILL NOT tolerate it,” Sarah, 29, hit back.
"What's up with Ariel Winters outfit tho?"another troll wrote, to which Sarah replied: "You know that she's [fire emoji]?? I KNOW."
However, there were some positive comments.
Hyland’s fiancé and Bachelor Nation alum Wells Adams commented on the slideshow: “You ladies both look 🔥!!!”
Their co-star Jesse Tyler Ferguson’s husband Justin Mikita similarly wrote: “You both look hawt. holy s*** mama!!!!!”
Sarah and Ariel have spent over a decade working together on the hit show, and appear to be just as close as real-life sisters.
"I love these people with all my heart. 11 years together is proof you and your TV sister will start wearing the same outfit, siblings for life will be made, and you'll forever fight over the same professor," she wrote alongside the wrap party photo.