Pecker is a key witness in the case against the former US president, who is accused of falsifying business records to cover up hush-money payment
Sahar Tabar was detained over charges of "cultural crimes and social and moral corruption", semi-official Tasnim news agency reported.
She altered her face through cosmetic surgery which then resembled a spooky version of Jolie and posted on Facebook-owned Instagram.
"She faces charges including blasphemy, inciting violence, gaining income through inappropriate means and encouraging youths to corruption," the report added.
Instagram is the only social media platform allowed in Iran while all other popular platforms like Facebook and Twitter are banned.
She became famous on Instagram last year after posting a series of images of her face altered through plastic surgery.
In some images, "she is wearing a hijab over her hair and a white bandage on her nose, commonly seen on Tehran's streets".
Pecker is a key witness in the case against the former US president, who is accused of falsifying business records to cover up hush-money payment
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