Fashion designer Mossimo Giannulli confronted the counselor, identified by the Los Angeles Times as Philip Petrone, at Marymount High School in Los Angeles, the girls’ school, in 2018, according to the documents filed this week in the federal college-admissions case.

Giannulli was angry because Petrone had questioned the teen’s supposed crew prowess to a rep from the University of Southern California about a month earlier, after the school worker told the counselor that the girl was going to be a rowing recruit — and the counselor had never heard she was involved in the sport.

“I told [the rep] I had no knowledge of involvement in crew and based on what I knew of her video blogging schedule, highly doubted she was involved in crew,” Petron told investigators about the conversation, according to the documents.

Word of that discussion got back to Giannulli, who allegedly went to the school to confront Petrone about jeopardizing his daughter’s entry into USC.

At the school, Giannulli launched into an “agitated stream of consciousness” about his daughter’s acceptance into USC, asking the counselor if he had any idea who she was or what she had going for her.

Petron responded by saying he had highlighted his daughter’s video blogging in a recommendation letter to USC, portraying her as a “guru” at it.

“Mr. Giannulli went on to say [I] still did not ‘get it,’ I was his daughters’ counselor, I was supposed to help them. He then stated he ‘knows lots of people,’” Petron recalled.

“His tone made me visibly nervous,” the counselor told investigators, according to the documents.

After the confrontation, the counselor checked the high school’s athletic records and found no mention of Giannulli’s daughter being on the crew team. He nevertheless later mentioned to a USC rep that Giannulli had assured him his daughter was a crew coxswain.

Giannulli and his TV actress wife are accused of paying $500,000 in bribes to secure their daughters’ admission to USC by helping to pose the girls as phony crew recruits.

A record of the dust-up between the designer and the high-school counselor was included in a cache of documents released by prosecutors this week that included staged photos of Loughlin and Giannulli’s daughters posing with rowing equipment.

The photos show Olivia Jade, now 20, and Isabella Rose, 21, their faces blurred, in workout attire on ERG rowing machines.

Giannulli, 56, had emailed Isabella’s photo to the college-admission scandal’s mastermind, William “Rick” Singer, on Sept. 7, 2016, prosecutors alleged in court documents.

He and his wife both pleaded not guilty in the alleged scheme and are scheduled to go to trial in October.