On a recent Sunday morning in West Hollywood, the actress Danielle Deadwyler wore all white, clad in a pristine Tory Burch dress.

“You know what white represents?” she said. “Spiritually, it’s rebirth: You get baptized, you put on a white robe, and you allow yourself to be witnessed in a certain way and to be changed. I think I’m in the midst of all of that.”

Did she have a sense of where that change would take her?

“Hell no,” Deadwyler said. “But I’m open.”

Certainly, she appears headed in the right direction. After supporting roles in “The Harder They Fall” and “Station Eleven” established her as an actress to watch, Deadwyler’s career breakthrough came two years ago with the film “Till,” about the 1955 Mississippi murder that helped catalyze the civil-rights movement. For her deeply felt performance as Mamie Till, whose 14-year-old son Emmett was slain by white supremacists, Deadwyler won leading honors from the NAACP Awards, Gotham Awards and National Board of Review.

She’s every bit as powerful in Netflix’s “The Piano Lesson,” which premiered on the streamer last week and is once again earning the 42-year-old actress awards buzz. Based on the play by August Wilson, “The Piano Lesson” casts Deadwyler as Berniece, a widowed mother at odds with her brother, Boy Willie (John David Washington), in post-Depression-era Pittsburgh. Both siblings must contend with generational trauma that’s wrapped up in the fate of their family piano: Though Boy Willie wants to sell it to buy land, Berniece insists the piano should stay put, since it serves as a totemic reminder of what their enslaved ancestors have been through.

As Berniece deals with Boy Willie, rebuffs the preacher Avery (Corey Hawkins), who seeks to court her, and shares a surprising, erotically charged moment with her brother’s friend Lymon (Ray Fisher), Deadwyler feels compellingly real in the role. “I’ve never felt like I was watching Danielle in this, I never thought of her outside the role,” said Denzel Washington, who produced the film. Unlike other actors who are determined to show their work, Deadwyler simply embodies the character, Washington said: “If you can dissect it, then they’re probably not very good, right? It’s what you get from it that’s proof of what they’re doing — it’s what you feel.”