According to Variety, Ryan Gosling and Anthony Mackie will topline the indie pic Half Nelson, a feature adaptation of helmer Ryan Fleck's Sundance-winning short film "Gowanus, Brooklyn."

The drama, lensing this month in Gotham, follows a unique relationship between a white schoolteacher, his African-American student and a local drug dealer.

The pic is being helmed by Fleck, who co-penned the screenplay with Anna Boden. She is producing, along with Traction Media, the firm behind Lions Gate's upcoming Hard Candy.