Anna Nicole Smith‘s daughter Dannielynn Birkhead‘s all grown up … rocking an outfit previously worn by Janet Jackson and attending Kentucky Derby events with her dad, Larry.

The 17-year-old appeared in Larry’s recent Instagram post … smiling in a couple cute father-daughter pics on the way to the Barnstable-Brown Gala — a star-studded lead-up to Saturday’s big race.

Check out the pic … Dannielynn’s in a full black get-up here, covered in zippers Larry said he bought from Julien’s — a popular auction house.

Julien’s describes the dress as a “Gianfranco Ferre black dress that’s knee-length in the front and floor-length in the back and features zippers all around.” It recently sold for $780 on the site.

The pics are a rare glimpse into the Birkheads’ lives … they generally avoid media attention though they reportedly have made a tradition of attending the Kentucky Derby together — hitting the biggest day in horseracing every year since Dannie was 3.

And, Janet Jackson chic seems like Dannielynn’s fashion method of choice for the annual soiree … remember, when she and Larry attended the Derby in 2022, she wore another Jackson special — and, even got to take a pic with JJ while in it.

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Of course, Dannielynn was just months old when her mother was discovered unconscious in her Florida hotel room in February 2007. Her death was ruled an accidental overdose … she was just 39.

Pretty wild to see Dannielynn growing up so quick … enjoy the Derby, you two!