Emma Heming celebrated her milestone 50th birthday with a huge party — and her husband’s ex-wife — because she knew it’s what husband Bruce Willis would have done for her.

The caregiver advocate posed next to Demi Moore and stepdaughter Tallulah Willis, in a group photo from the fête published via Instagram on Friday.

In another pic, Heming posed arm-in-arm with Tallulah, 32, who cradled a tiny pup for the snapshot.

Other pics revealed that Heming’s bash included a taco truck, a two-tiered cake, and a large crowd of pals — but the model divulged in the caption that she initially thought she wouldn’t do much to mark her 50th amid husband Bruce’s ongoing battle with FTD (frontotemporal dementia.)

Recalling that a friend kept asking her “What are we doing for your 50th?” Heming wrote that her “answer was always the same, nothing.”

Heming wrote that the more she thought about it, the more she “realized that milestones really matter. And if there’s one worth celebrating, it’s 50.”

“I never want to look back on my life with regret,” Heming reflected, noting that she found herself “thinking about what Bruce would have done for my 50th.”

“If you knew what he did for my 40th, you’d know there would have been a massive celebration,” she shared, “So we had one.”

Heming shared that friends and family “took over” and “pulled off a night [she’ll] never forget.”

“A home filled with family and friends who have witnessed so many chapters of my life,” she wrote of the celebration. “People who have shown up for me, time and time again, with love, loyalty, authenticity and understanding. It was a beautiful way to welcome 50,” she concluded the post, noting that “the Knicks won that night too.”

On Thursday, Heming took to Instagram with a heartwarming nod to her husband — including a video of him entertaining their daughters with a goofy rendition of “Happy Birthday” during a previous birthday.

In a snapshot, they embraced while wearing party hats. “My 40s were heavy, yet I’m proud of how far I’ve come as a wife, mom, care partner, and advocate,” she wrote, adding that she’s “also proud of the work we’re doing through the Emma & Bruce Willis Fund and what lies ahead.”

She continued, “Together, we’re raising awareness of FTD, supporting caregivers, and advancing education and research.”

The Die Hard actor — with whom Heming shares daughters Mabel, 14, and Evelyn, 12 — retired from acting in 2022 amid an aphasia diagnosis.

A year later, in 2023, the famous family — including Bruce and Moore’s other two daughters, Rumer, 37, and Scout — 34 announced the “Sixth Sense” star’s diagnosis of FTD.

Since then, Heming has advocated for those affected by the complex condition and their caregivers.

“This journey has opened my eyes to the realities so many families face when a loved one is living with frontotemporal dementia,” she said earlier this year, while announcing the Emma & Bruce Willis Fund for Dementia Research and Caregiver Support.

Heming, who accepted the Susan Newhouse & Si Newhouse Award of Hope at The Association for Frontotemporal Degeneration’s Hope Rising Benefit in New York in March, added, “I believe deeply in the importance of supporting research while also showing up for the caregivers who carry so much every day.”