The 260-lb teen agreed to appear in the hopes of losing weight, but the lawsuit contends that her trainer shouted at her during a hike and forced her to fall off a StairMaster. Pagliarolo says she suffered serious injuries as a result.
"We haven't received this purported lawsuit but if it does materialize we will defend ourselves against it vigorously and fully expect to prevail," a show rep told TMZ.
"Rachael Ray" has faced legal problems before. In 2008, an anorexic ex-account for the show sued for disability discrimination, after he was asked to leave for telling his immediate boss that she had created a "hostile work environment" for him.