Toy manufacturer Mattel has said it "deeply regrets" a misprint on packaging for dolls inspired by the new Wicked movie which listed the address for an adult website.
The company recently released the singing dolls ahead of the long-awaited film starring Cynthia Erivo and Ariana Grande.
But eagle-eyed fans posted images on social media showing the packaging had a pornography website on it, instead of the movie's web address.
In a statement, Mattel apologised for the "unfortunate error" and advised parents that the misprinted website "is not appropriate for children".
The BBC has seen online instructions on Mattel's website, for both the Glinda and Elphaba dolls, listing the erroneous website underneath the Universal Pictures logo - the film studio behind the movie.
Mattel recommends the dolls for children aged four and above.
Fans who bought the doll posted about their surprise on social media.
"I purchased the Singing Elphaba doll and upon inspection, the website printed on the back side [of the] Mattel box, right above the barcode is listed as... an unaffiliated adult [not safe for work] 18+ website," one person posted on Reddit.
"Anyone else seeing this!?"
In another post, a US-based woman said: "Went to Target and Walmart today and yeah, the Wicked dolls have the [porn] website listed."