Authorities later searched an Avondale apartment listed in Hopkins' name. They say they found another 100 pounds of marijuana.
Hopkins starred in the 1989 movie "Lean on Me" at 15 and has appeared on several TV shows.
Hopkins lives in North Carolina. He's being held on $35,000 bond on suspicion of two felony counts of possessing, transporting and trying to sell marijuana.
It was unclear Thursday whether Hopkins has legal representation yet.