Katy Perry has been accused of sexual assault by her "Teenage Dream" co-star

Josh Kloss, who appeared in Katy Perry's "Teenage Dream" music video, has accused the pop star of sexual assault.

The model alleges that the pair ran into each other after her divorce from Russell Brand and that's when the misconduct happened.

Josh has opened up about his experience in an Instagram post to mark the 10 year anniversary of filming the video.

WATCH: Josh Kloss confronts Katy Perry on her alleged sexual abuse

"This one time I brought a friend who was dying to meet her," he wrote. "It was Johny Wujek’s birthday party at Moonlight Rollerway. And when I saw her, we hugged and she was still my crush. But as I turned to introduce my friend, she pulled my Adidas sweats and underwear out as far as she could to show a couple of her guy friends and the crowd around us my penis."

"Can you imagine how pathetic and embarrassed I felt? I just say this now because our culture is set on proving men of power are perverse. But females with power are just as disgusting," he continued.

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You know. After I met Katy, we sang a worship song, "open the eyes of my heart" She was cool and kind. When other people were around she was cold as ice even called the act of kissing me "gross" to the entire set while filming. Now I was pretty embarrassed but kept giving my all, as my ex was busy cheating on me and my daughter was just a toddler, I knew I had to endure for her sake. After the first day of shooting, Katy invited me to a strip club in Santa Barbara. I declined and told her "I have to go back to hotel and rest, because this job is all I have right now" So I saw Katy a couple times after her break up with Russel. This one time I brought a friend who was dying to meet her. It was Johny Wujek's birthday party at moonlight roller way. And when I saw her, we hugged and she was still my crush. But as I turned to introduce my friend, she pulled my Adidas sweats and underwear out as far as she could to show a couple of her guy friends and the crowd around us, my penis. Can you imagine how pathetic and embarrassed i felt? I just say this now because our culture is set on proving men of power are perverse. But females with power are just as disgusting. So for all her good she is an amazing leader, hers songs are mainly great empowering anthems. And that is it. I continued to watch her use clips of her music videos for her world tour and then her dvd, only highlighting one of her male co-stars, and it was me. I made around 650 in total off of teenage dream. I was lorded over by her reps, about not discussing a single thing about anything regarding Katy publicly. And a couple interviews they edited and answered for me. So, happy anniversary to one of the most confusing, assaulting, and belittling jobs I've ever done. Yay #teenagedream I was actually gonna play the song and sing it on ukele for the anniversary, but then as I was tuning I thought, fuck this, I'm not helping her bs image another second.

Josh also touched on his negative experience while filming the Teenage Dream video back in 2009.

"When other people were around she was cold as ice even called the act of kissing me “gross” to the entire set while filming," he said.

WATCH: Katy Perry takes off Josh Kloss' pants in 'Teenage Dream' music video

He also claims Katy invited him to a strip club (an invite he declined) and that he only made $650 for the job, despite it appearing on her video and tour.

The now 38-year-old explains that reps urged him to keep quiet, but he had decided to use the anniversary to to break his silence.

"I was lorded over by her reps, about not discussing a single thing about anything regarding Katy publicly. And a couple interviews they edited and answered for me," he said.

He finished with "So, happy anniversary to one of the most confusing, assaulting, and belittling jobs I’ve ever done. Yay #teenagedream"

Josh's post highlights the double standard that can exist around sexual assault.

It's important to note that the allegations are currently just that — allegations — as Katy hasn't addressed the claims yet. But sexual assault is always something that should be taken seriously — whether the victims are male or female.

WATCH: Taylor Swift and Katy Perry hug it out in new music video

If you or someone you know is affected by sexual assault or family violence, call the 1800RESPECT hotline or visit www.1800respect.org.au/. You can also call the Domestic Violence Hotline on 1800 656 463.

Emma Norris

Emma is Deputy Editor at Girlfriend magazine. She's obsessed with being cozy at all times, eating cheese, binge-watching comedy shows and reading Facebook comments about anything and everything.