Mena Suvari says ‘Grace and Grit’ was ‘most challenging thing’ she’s ever done

Mena Suvari has found the role of a lifetime.

Even reading the script for “Grace and Grit” — out now in theaters, streaming and on demand — left the “American Pie” actress “just completely blown away,” Suvari told the Daily News.

The romantic drama, based on philosopher Ken Wilber’s nonfiction book of the same name, is about his whirlwind romance with his wife Treya, which is very quickly put to the test by her cancer diagnosis.

“It was the most challenging thing I think I’ve ever done and probably will ever do,” said Suvari, who scored a BAFTA nomination for “American Beauty.”

After a sit-down with writer-director Sebastian Siegel, who she worked with on “The Murder of Nicole Brown Simpson,” Suvari said she “felt like I understood this love” and the couple’s “fight for this … beautiful life together.”

“The fight and the passion … to be so real and raw with one another, and the ultimate sacrifice, the selflessness with one another. It was so beautiful to see that something like that had existed and was possible,” said Suvari, 42.

She noted that digging into the couple’s world and reading multiple books by Ken Wilber “completely changed” her “whole life, everything. It changed my whole perspective.”

Amazed by the pair’s ability to keep a positive outlook despite all they endured, and to stick together through it all, Suvari said the couple’s story made her reevaluate what’s important and how she hopes to live.

“I think it developed such a deeper sense of gratitude for me, because it opened up my perspective in that way,” she explained.

Though Suvari didn’t spend time with Ken Wilber in preparation for the film — in part because the process was so quick — the star admitted she “didn’t necessarily want to.”

While “very emotional” about Wilber’s praise of her portrayal of Treya, Suvari said it’s hard for her to wrap her head around it.

“It’s very uncomfortable for me,” she said. “How do you be that person for someone... not only their partner, and … that loss for them. (To be) the greatest love of his life? It was very hard to be that person.”

Wilber, who is portrayed by Stuart Townsend, communicated his approval to the “Rumor Has It” actress in his book “No Boundary.”

Siegel gifted Suvari a copy which Wilber inscribed: “Sebastian tells me you are the one."

“I don’t even know if I have words for how that makes me feel,” Suvari said. “It was beautiful.”

For the Screen Actors Guild winner, that acceptance from Wilber is “a very delicate thing.”

Suvari referred to making the film as “the most beautiful experience I’ve ever had,” but she’s not quite ready to meet Wilber face to face.

“I know that it will be extremely uncomfortable when I do,” Suvari laughed.