Image Source: Getty / Lawrence Lucier [1]

Sophia Bush and Hilarie Burton have been friends ever since they starred together on One Tree Hill [2], so you bet they have each other's backs. Earlier this week, Hilarie took to Twitter to explain why she isn't attending any of the EyeCon Convention reunions [3] this year, saying she "personally feel[s] exploited by their 'girl power' angle" and that "they're using our sisterhood as a sales gimmick."

I'm sorry Mary. I will not be attending any Eyecon events. Ever. I personally feel exploited by their "girl power" angle, which exists at the expense of some of us who went through a difficult time on that show. They're using our sisterhood as a sales gimmick. No thanks.

— Hilarie Burton (@HilarieBurton) March 27, 2018 [4]

Of course, it didn't take very long for Hilarie to receive backlash for criticizing the convention's theme. Luckily, Sophia jumped to her friend's defence. "@HilarieBurton is my sister," Sophia wrote. "Don't f*ck with her. Period."

.@HilarieBurton [5] is my sister. Don't fuck with her. Period.

Pt. 1 pic.twitter.com/eAf7usSJq4 [6]

— Sophia Bush (@SophiaBush) March 29, 2018 [7]

.@HilarieBurton [8] is my sister. Don't fuck with her. Period.

Pt. 2 pic.twitter.com/9fX8KAX5Dp [9]

— Sophia Bush (@SophiaBush) March 29, 2018 [10]

Back in November, 18 former cast and crew members from the beloved show came forward to accuse former showrunner Mark Schwahn of sexual harassment [11] during the filming of the series, which aired from 2003 to 2012.

EyeCon has since released an apology.

pic.twitter.com/M9tlRvROED [12]

— EyeCon (@EyeCon3000) March 29, 2018 [13]