An adult-film actress and a pornography producer face charges for allegedly sexually abusing a girl under the age of 10 for several months in Rancho Cucamonga.

Melinda Smith, 35 — who works under the stage name Mercedes Carrera — and Jason Whitney, 43, were each charged Tuesday with eight counts of sexual abuse of a child under the age of 10 and one count of possession of a controlled substance, according to court records.

Whitney also goes by Daemon Cris in the porn industry and Jay Allan on social media, the San Bernardino County Sheriff’s Department said.

They pleaded not guilty to all of the charges Wednesday, according to the District Attorney’s Office.

Investigators were alerted to the alleged abuse on Thursday, Jan. 31, according to a Sheriff’s Department news release.

Detectives conducted an “extensive interview with a minor female victim” and determined she had been sexually abused several times over four months by Smith and Whitney, both Rancho Cucamonga residents, officials said. Authorities did not specify how the victim knew Smith and Whitney in order to protect the child’s identity.

“The sexual abuse consisted of inappropriate touching, oral copulation and digital penetration, which occurred over four months,” the sheriff’s statement said.

The alleged abuse began in the summer of 2017, according to the criminal complaint filed in West Valley Superior Court.

Whitney has produced and directed pornographic movies, web shows and award shows in the adult-film industry, officials said.

Investigators served a search warrant Friday, Feb. 1 at Smith and Whitney’s home at the Carmel at Terra Vista apartments at 10850 Church St.

During the search, detectives found evidence that corroborated the victim’s statement, said sheriff’s officials, who added they also found methamphetamine and two loaded handguns. Detectives discovered the couple had a makeshift studio in their bedroom for adult film shoots.

Sheriff’s officials did not indicate if they believe the alleged victim’s assaults were recorded.

After questioning Smith and Whitney at the sheriff’s Rancho Cucamonga station, detectives arrested the couple. Smith and Whitney were being held without bail at the West Valley Detention Center in Rancho Cucamonga. They are scheduled to be back in court Feb. 14.

Authorities asked that anyone with information on the case call them at the Rancho Cucamonga sheriff’s station: 909-477-2800. Callers wishing to remain anonymous can contact the WeTip Hotline at 1-800-78-CRIME (27463) or at wetip.com.