Photo: Instagram

Model Ireland Baldwin has upset her dad and uncle with a nearly nude Instagram photo.

The 23-year-old beauty stripped off, wearing nothing but an almost invisible thong for her latest reveal, taken from behind on a patio at the SIXTY SoHo hotel in New York City, as she looked out at the skyline.

"thank you @sixtyhotels for the beautiful stay. I may never be allowed back but it's chill," she wrote on Wednesday in the caption to the revealing image.

"Also my butt isn't that white. It's the sun. No it's also that white," she jokingly added.

Ireland has posted nudes of herself on social media several times but this time she's really upset her actor father Alec Baldwin and his brother Billy.

"Tough one for Uncle Billy to 'like'. #awkward," Ireland's uncle responded, before her confused dad chimed in: "I'm sorry. What?"

Ireland also stripped off in an attempt to urge all women to respect their bodies on America's Independence Day earlier this month. Posing naked on a beach with her arms in the air, Ireland offered her followers helpful tips on how to live a more fulfilling life, including ditching vape pens, buying vitamins and vegetables, getting your breasts checked for cancerous lumps, and being active.

"Yoooo!!! Love your body. Respect your body. Breathe fresh air. Be happy. Laugh it all off," she wrote. "Spend your remaining time on this earth with people who love you and make you feel good and if you don't have many of those people, get out and go look for them. Some of y'all are taking this whole life thing so damn seriously... and it's so not worth it."