According to a jail spokesperson, Hopper's bail is set at $25,000.
In a shocking mugshot, the normally clean-cut 24-year-old appears haggard and unkempt.
A spokesman for the Nebraska State Patrol told RadarOnline.com Hopper was arrested at 3:45 PM after a Nebraska State Patrol trooper stopped his vehicle for failure to signal.
- ‘She’s Walking A Dangerous Road’: Robin Wright’s Friend Concerned As Actress Gets Close To Ex-Husband Sean Penn Years After Divorce Left Her 'Devastated'
- Reunited: Sean Penn & Ex-Wife Robin Wright Spotted At LAX Again After Rumored Trip Together 13 Years Post-Divorce
- Back On? Exes Sean Penn & Robin Wright Spotted Together Weeks After Finalizing Their Separate Divorces
"During the traffic stop, the trooper detected drug activity and searched the vehicle," Officer Cody Thompson told RadarOnline.com. "Troopers found 14g of marijuana, 4 amphetamine pills, and 3g of psilocybin mushrooms."
Hopper was in the car with 26-year-old actress girlfriend Uma Von Wittkamp, who was also arrested on drug possession charges.
Hopper was charged with possession one ounce of marijuana and for possession of a controlled substance (psilocybin). Psilocybin is also referred to as mushrooms, a psychedelic drug.
Von Wittkamp was charged for possession of amphetamine and psilocybin.
Hopper has spoken publicly about his struggle with substance abuse in the past. In an interview with E5, he admitted he fell in with the "wrong crowd" following his famous parents' nasty divorce.
"I was doing a lot of stuff, but meth was the main one that brought me down. I went to rehab because I woke up in hospital and my dad said, 'Rehab? Or bus bench?' I was like, 'I'll take the bed,'" Hopper said.
We pay for juicy info! Do you have a story for RadarOnline.com? Email us at firstname.lastname@example.org, or call us at 800-344-9598 any time, day or night.