Watch: 'Shadowhunters' Actor Dominic Sherwood Apologizes for Using Gay Slur

Dominic Sherwood, an actor on the popular Freeform series "Shadowhunters," took to Instagram Tuesday evening to apologize to fans after being caught using a gay slur, E! News reports.

Sherwood, 27, was on co-star Matthew Daddario's Facebook Live Tuesday while he spoke with fans. During the recording, Sherwood could be heard in the background, greeting his co-star by saying, "What's up fag?"

Daddario then told Sherwood, who was apparently unaware that he was being recorded live, "Stop! Stop! I'm live," according to E! News.

Later that day, Sherwood took to Instagram, posting an apology video to fans with Daddario standing next to him.

"I'm speaking to all of you today to hold myself accountable and not to make any excuses in any way," the actor said. "The way I behaved today was disgusting and abhorrent, and Matt's reaction was absolutely correct, it was one of disgust, I think so many problematic phrases go unchallenged, and they perpetrate negativity and hate and intolerance, and today I was a part of that, and I am truly, truly sorry."

Sherwood added he is sorry for "disappointing" his fans. Daddario then thanked the "Shadowhunter" fans and said the show's cast and crew stand for "love and kindness" and support everyone who watches the show.

Watch Sherwood's apology video below.