HOLLYWOOD — At 50, Holly Hunter had the athletic confidence of a movie star enjoying her prime recently as she strode across the patio of a local cafe in a sundress and heeled pumps so high they appeared almost vertical.

She raised a small arm with an impressive biceps to shake hands. While other patrons stood in line to order, the waiters, notified in advance of her arrival, brought a menu to her table.

Like many female stars whose biggest parts once seemed behind them, Hunter might have been doomed to the standard mom or spurned wife roles. But riding the crest of actresses leading television series, she has revitalized her career on the small screen as Grace — a hard-drinking, promiscuous Southern detective monitored by a crusty angel named Earl.

Unlike, say, Kyra Sedgwick in “The Closer” or Glenn Close in “Damages,” Hunter’s “Saving Grace” role has veered into new territory as that rarely seen character: an explicitly sexual 40-year-old woman. In a titillating mix of pleasure and religion, Grace, a driven detective and kindly aunt, often is shown having sex, sometimes with married men, and then debating her behavior with Earl.

Although some critics charged that her rebel-hero character was “tiresome,” others also allowed that the TNT cable channel pushed boundaries with her coarse language and semi-nude sexuality.

“Grace is a study of human nature first and foremost,” Hunter said. “The allure of Grace is her complexity. She can often entice conflicts, and she surrenders to her desires, what she feels could be the most fun, intoxicating, seductive, tantalizing, what could be the most cool. So many people slog through the moments to, say, get to Friday. Grace lives fully.”

The Oscar-winning actress was nominated for a Golden Globe for “Saving Grace” and this year received a star on Hollywood’s Walk of Fame. Now shooting its second season, “Saving Grace” will launch Monday on TNT.

Hunter said she leaped at the chance to play Grace, because, “I wanted to have that conversation with myself, with other characters and with an audience. Movies aren’t made about a woman’s whole life.”

Hunter has won two Emmys for “The Positively True Adventures of the Alleged Texas Cheerleader-Murdering Mom” (1993) and “Roe vs. Wade” (1989).

What she didn’t want to have a conversation about on that particular afternoon was herself. Serious and earnest, Hunter spoke eagerly about the arc of her career, her professional friendships and her intense involvement in the show but turned curt when it came to her own life — a six-year marriage to cinematographer Janusz Kaminski and her 2-year-old twins fathered by her current partner and actor Gordon MacDonald, who has appeared in “Saving Grace.”

With a fleeting smile, Hunter said she would neither “confirm or deny” the twins’ existence. She suggested MacDonald not be mentioned at all in the article.

“The world is chock-full of actors and actresses who want to talk about their personal lives. I don’t,” she said. “And I really want that respected.”

As an actress, Hunter often is described as ferocious, fearless, feisty and focused. Her movie roles have varied from funny and offbeat (“Raising Arizona”) to strong and quirky (“Broadcast News”) and intense and dramatic (“The Piano,” for which she won the Oscar.)

‘Saving Grace’

When: Season 2 premieres at 10 p.m. Monday

Where: TNT