AMANDA BYNES’ reportedly hearing voices and mumbling to herself as she appears to be descending into drug-addled madness.

Bynes’ erratic and disturbing behavior has taken a drastic turn for the worse because the former Nickelodeon star has been hearing voices and talks to herself in unintelligible sentences, reported.

Bynes has been “spotted wondering the halls of her New York City apartment building at all hours of the night.

"She talks to herself in language that in nonsensical and has been hearing voices.

“Amanda is also extremely paranoid and thinks there are tracking devices in the smoke alarms in the apartment. She looks completely disheveled and she is scaring some of the other residents in the building with kids,” a source said.

Apparently, Bynes’ has also been toking up a LOT of marijuana.

 “Amanda’s increasingly disturbing behavior is related to the fact that she smokes pot.

"It makes her more paranoid and instead of mellowing her out, it does the opposite. Amanda begins talking faster and just can’t seem to sit still,” an insider told Radar.