The Gossip Girl actress and Pretty Reckless frontwoman was released from her previous IMG Models' contract, despite being named as the face for Madonna's Material Girl line, E! Online reports.
An agency spokesperson confirmed: "IMG and Taylor Momsen amicably parted ways over a year ago.
"We have nothing but the highest regard for her and wish her continued success."
Twilight actress Dakota Fanning has apparently since been posted on the agency's website.
> Taylor Momsen 'booed at Glasgow gig'