The New York Post said Bynes' court date is related to her arrest for allegedly throwing a marijuana bong out of her 36th-floor apartment window.
Prosecutors have filed paperwork saying they are ready for trial, but they made no offer or recommendation for a plea deal in the case, the Post said.
Her next court date was set for Sept. 26.
The 27-year-old actress starred in "The Amanda Show," as well as the films "Hairspray" and "What a Girl Wants," but her last major screen credit was a supporting role in 2010's "Easy A."
Her once-bright career has been eclipsed in recent years by her bizarre Twitter rants and media reports of her erratic behavior and brushes with the law.
'Maze Runner' tops the North American box office
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