Jeffree Star Tells James Charles' Brother Ian Jeffrey to 'Shut the F*** Up' In Since-Deleted Twitter Post Amid Westbrook Feud

James Charles' younger brother Ian Jeffrey, who found fame through appearing in some of the YouTube makeup guru's videos, was quickly shut down by Jeffree Star this weekend after he posted a tweet in apparent defense of his older brother.

Star — an American internet celebrity and makeup artist — on Sunday issued his support for Tati Westbrook, 37, who sparked a feud with 19-year-old Charles on Friday by posting a nearly 45-minute-long exposé video detailing her fallout with the influencer titled "Bye Sister."

"There is a reason that Nathan banned James Charles from ever coming over to our home again," Star tweeted. "There's a reason why I haven't seen him since [Westbrook's] birthday in February. He is a danger to society. Everything Tati said is 100% true."

Shortly after, Charles' 17-year-old brother tweeted, "Why does everyone act so tough on the internet," to his 325,000 followers, in an apparent move to defend his brother and call out those who have attacked him since the feud began.

"Why is your brother a predator?? Why'd you really move back to NYC? Exactly. Shut the f**k up," Star responded to Jeffrey's tweet.

Both Jeffrey and Star's tweets have since been deleted. However, a screenshot of the posts can be seen on Hollywood Life.

Star, Westbrook and Charles had all previously been on good terms and had even featured in each other's YouTube videos before the feud erupted. In August 2018, Charles and Star featured together in a video posted to fellow YouTuber Shane Dawson's channel. It is unknown exactly when their friendship soured.

In Westbrook's video, which ignited the ongoing feud with Charles, she accused her fellow YouTuber, who she formerly mentored, of disrespecting their friendship by making a sponsored Instagram post for her direct competitor Sugar Bear Hair. Westbrook also called out Charles' allegedly "gross" behavior regarding his dealings with straight men.

"I have finally had enough," Westbrook said in the clip. "He said some things, telling me about a situation that happened in Seattle at my birthday, and it literally made me want to vomit."

"Oh my God, you tried to trick a straight man into thinking he's gay, yet again," she continued. "And, somehow, you're the victim. You know, it's really disgusting to manipulate someone's sexuality, especially when they are still emerging into adulthood."

Westbrook added: "You are using your fame, your power, your money to play with people's emotions. You're threatening to ruin them, you're threatening to embarrass them and you're doing that to have them behave sexually in your favor."

Charles responded to the allegations in a video posted shortly after simply titled "Tati," where he asked to be forgiven and addressed the allegation of inappropriate behavior towards straight men.

"Boys have been a topic talked a lot about on my social media journey, and it's a topic that wish I hadn't," he said. "I've been involved in a lot of unique and strange situations that have left people confused or upset. I learned the hard way about ways that I can interact with boys that I've put trust in and ones that I shouldn't be talking to."

"This is a conversation that I know a lot of people are uncomfortable with and it's something I should've been far more careful with bringing into the public eye, especially with the last situation that happened," Charles added. "I've had to learn it the hard way."

Over the weekend, Charles has lost upwards of 2 million subscribers amid the ongoing scandal, while Westbrook has gained nearly as many followers.

Singer and Make up Artist Jeffree Star poses for photos at Cosmoprof at BolognaFiere Exhibition Centre on March 17, 2018 in Bologna, Italy. Star on Sunday rebuked Ian Jeffrey's apparent defense of his brother James Charles on Twitter, in a since-deleted post. Rosdiana Ciaravolo/Getty Images