Amanda Bynes' strange behavior has inspired one former co-star of hers to reach out in an attempt to help her.

Actress Jennie Garth, who played Bynes' older sister in the comedy "What I Like About You" from 2002-2006, said she has made several attempts to reach out to the 26-year-old because she "loves her dearly."

"I tried reaching out to her and I haven't been able to reach her," Garth told Us Weekly. "My heart feels for whatever she is going through and I love her dearly." 

Us Weekly spoke to Garth, 40, at ELLE magazine's Women in Hollywood event in Beverly Hills on Monday, Oct. 15.  

Garth became concerned about Bynes after she had been arrested several times for many auto-related incidents, including hit-and-runs, alleged drunk driving and driving on a suspended license. Bynes has also been spotted talking to herself in New York and California.

Last month, Bynes locked herself in the bathroom of a New York City bakery for two hours. The extended bathroom break reportedly concerned a firefighter so much that he called police and requested to kick the door down. Bynes finally came out and explained she had been doing her makeup.

The former Nickelodeon star has been dropped by her agent, publicist and entertainment lawyer due to her erratic behavior and lack of communication, according to reports.

"Amanda shut them out and isn't speaking to them," a source said in the Oct. 8 issue of Us Weekly.

"I tried to help too," gossip writer Perez Hilton tweeted about the starlet. 

Her uncle, Ronald Bynes, reportedly told Celebuzz that alcohol has caused the star's decline. 

"She needs to stop drinking and driving," Ronald said. "She needs help." 

"Amanda is out of control," another source told Us Weekly. "It's been slowly going on for years, but now it's getting really bad."

On Oct. 15, the starlet reportedly had her attorney enter not guilty pleas to two counts of driving on a suspended license. Bynes' BMW was impounded on Sept.16 after she continued to drive her car not long after her license was taken away. She also pleaded not guilty on Sept. 27 to a pair of hit-and-run charges through her attorneys at a brief court hearing in a Los Angeles court. The misdemeanor charges stemmed from two minor crashes in April and August. 

Bynes is due back in court for one of several cases on Nov. 29.