Former star of The Wonder Years Fred Savage has said assault claims made against him are "without merit and absolutely untrue".
The actor is being sued, along with 20th Century Fox, by a former colleague who says he assaulted her in an "extremely hostile" on-set environment.
Youngjoo Hwang was working in the costume department on TV show The Grinder and said the alleged assault happened in 2015.
Fox has also denied the claims.
Hwang claims the studio covered up the allegations and indicated she would be blacklisted unless she kept quiet.
She says Savage was aggressive, intimidatory and constantly hurled profanities at female employees which culminated in the assault during a heated exchange.
"(Ms Hwang) explained to defendant Savage that she was simply dusting off dandruff on his jacket. In response, defendant Savage violently struck Ms Hwang's arm three times with his hand," lawyer Anahita Sedaghatfar wrote in the lawsuit, filed in Los Angeles on Wednesday.
She also claimed that Fox "essentially admonished" Hwang to "keep her mouth shut and not report the harassment and ultimate physical assault perpetrated upon her or she would 'never work in the industry again'."
Hwang is seeking damages and compensation over claims of assault, battery and harassment.
20th Century Fox said that Savage, 41, was cleared by an internal investigation.
In a statement, the actor - who played Kevin Arnold in The Wonder Years during the late 80s and early 90s - praised the "tremendous courage" of those who have come forward in the Me Too movement, and denied the allegations made against him.