Ashley Benson issued an apology for mocking troubled star Amanda Bynes on Thursday.

The Pretty Little Liars star posted a selfie on Instagram on Wednesday with the caption, "Doing my Amanda Bynes look this afternoon," angering fans and coming off insensitive.

Of course, Ashley had no idea that Amanda was arrested Monday night and detained in a psychiatric hospital to observe her mental state after she a fire in a woman's driveway in Thousand Oaks, California.

"To clear up the whole Instagram thing, I had no idea what her situation was," Ashley tweeted on Thursday. "Truly sorry if I offended anyone."