Gwyneth Paltrow made a rare public reference to her role as a stepmother when she posted an Instagram story celebrating the birthday of her husband Brad Falchuk’s daughter. In the message, the actress and Goop founder called herself “lucky to be your stepmom.”

On Saturday Paltrow, 52, shared a recent photograph of Isabella “Izzy” Falchuk and wrote, “Happy Birthday my snizzle. You have taught me so much about love. I am lucky to be your stepmom.” Izzy, 21, is Falchuk’s eldest child from his previous marriage.

Paltrow and Falchuk, 54, married in 2018. Falchuk shares Izzy and a younger son, Brody, 19, with his ex-wife Suzanne Bulnik, who divorced him in 2013 after roughly two decades of marriage. Paltrow has also shared family snapshots on social media that included her own children, Apple, 21, and Moses, 19.

In a recent social-media photo collection labeled “Summer,” Paltrow posted images of family time at the beach that showed Izzy and Brody alongside Apple and Moses. The birthday post follows that set of images and is one of the more explicit public acknowledgments by Paltrow of her role in Falchuk’s blended family.

Paltrow has kept much of her private life out of the spotlight since her marriage to Falchuk, focusing public attention on her lifestyle brand and professional projects. The Instagram tribute drew attention because she used the word “stepmom,” a term she has not frequently invoked in public statements about family life.

The post adds to a series of occasional, intimate glimpses Paltrow shares of family occasions on social media, where she has combined images from her domestic life with promotions for her business ventures. Representatives for Paltrow and Falchuk did not immediately respond to requests for comment.

The birthday tribute highlights the couple’s blended household and the public interest in how celebrities balance personal roles with public personas. Paltrow’s use of affectionate language in the message underscores a familial relationship that she has sometimes kept private while maintaining a high-profile career in entertainment and commerce.