Carrie Preston will play a gay rights activist in ABC's upcoming miniseries about the gay rights movement.

The eight-hour miniseries, titled When We Rise, has been in development at ABC for more than two years.

According to Deadline Hollywood, Preston (The Good Wife, True Blood) will play Sally Gearheart, described as a “regal and smart radical, who has had a long career as a gay rights activist.”

Deadline described the upcoming miniseries as chronicling the “personal and political struggles, setbacks and triumphs of a diverse family of LGBT men and women who helped pioneer one of the last legs of the U.S. civil rights movement from its turbulent infancy in the 20th century to its successes today.”

The project reunites the team behind the 2008 film Milk: Director Gus Van Sant, writer Dustin Lance Black and producer Bruce Cohen. Milk's subject was Harvey Milk, an LGBT rights activist and politician who was gunned down inside San Francisco City Hall. Van Sant is set to direct the first two-hour episode of When We Rise and will co-produce the series with Black, Cohen and Laurence Mark.