The actress was scheduled Wednesday to receive the Ad Astra Award at the Tallgrass Film Festival in Wichita, Kan., E! News reported.
Less than 24 hours before she was set to receive the award, McGowan informed organizers she would not be attending, stating she is canceling "all upcoming public appearances due to compounding factors surrounding recent revelations in the Harvey Weinstein sexual harassment case."
"While we're disappointed that Rose cannot be here with us in person, we understand that her well being is the priority. We support her and our thoughts are with her," Tallgrass creative director Lela Meadow-Conner added in a statement. "We'll seize this opportunity to amplify her message and celebrate all the women filmmakers with work here at the 15th annual festival."
McGowan was also expected to host a screening of her directorial debut Dawn at the event. In the wake of her absence, Tallgrass will host a panel featuring female filmmakers titled #WokeWomen: A Candid Conversation with Tallgrass' Female Filmmakers.
McGowan has been at the center of the Weinstein scandal as she was among the several women who stated to the New York Times that the film producer sexually assaulted them.
Since then, more women have come forward and McGowan's Twitter account was temporarily suspended as she continued to be critical of Weinstein, his production company and other actors she said were aware of what was going on including Ben Affleck.