She may be dressed like Casper, but she’s not nearly as friendly.

Troubled former child star Amanda Bynes jumped into an SUV on Thursday wearing a bright blue wig and a white sheet over her body after leaving the Hillmont Psychiatric Center Hospital in Ventura, Calif.

She had been placed in the loony bin after she set fire to a woman’s driveway, as well as to her pants, in Thousand Oaks last month.

Bynes was spotted near the site with a gas can, and the 27-year-old was placed in the psych facility.

The wacky episode follows her Nickelodeon arrest in May after the actress allegedly hurled a bong out the 36th-floor window of her West Side apartment.

Bynes is accused of tossing it after cops responded to a report that she had smoked a joint in her building lobby.

She donned a blue wig at a court appearance in Manhattan Criminal Court last month.She’s also tried to start bizarre Twitter wars with everyone from Rihanna to President Obama.

She hasn’t been a stranger to erratic behavior since then.

Her antics include donning a long blue wig at a court appearance in Manhattan Criminal Court, and being thrown out of the Ritz-Carlton for smoking pot and telling a staffer she was too ugly to check her in.