The troubled starlet was placed under a mandatory 5150 psychiatric hold, which means she's committed to a hospital, just like Britney Spears was during her breakdown in 2008.
TMZ reports that the fire department responded to a call last night after Amanda reportedly started a small fire in an elderly person's driveway in Thousand Oaks.
After questioning the 27-year-old, officials decided to place her on a 5150 hold for monitoring.
Yesterday before the fire, Amanda was spotted shopping at Bloomingdale's in Santa Monica wearing a wig.
A 5150 hold only lasts for 72 hours, but we're really hoping Amanda will get the help she clearly needs while at the hospital before she hurts herself or someone else.
Gallery | Amanda Bynes Photo Timeline: From Sweetheart to Troubled Star!