The Kardashians honored the memory of late dad Robert Kardashian on his birthday.

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Kourtney Kardashian, 38, Kim Kardashian, 37, and Rob Kardashian, 30, posted tributes to the late attorney Thursday on what would have been his 74th birthday.

Kourtney shared a throwback photo on Instagram of herself with her dad and Kim at what appears to be a Christmas celebration. Kourtney wears a white dress with a tiered skirt, while Kim sports a frilly pink dress.

"Daddy's girls," she captioned the picture. "Happy Birthday Daddy. I miss you every day. Kim wasn't as happy about her dress as I was."

Kim said in a post on her own account that she celebrated by ordering her dad's favorite cake.

"Happy Heavenly Birthday Dad! Miss you so bad. I ordered your favorite Ralph's cake to celebrate! Love you forever!" she wrote.

Rob, meanwhile, shared a throwback photo on Twitter of himself with his dad.

"Happppy Birthday Dad!!" he wrote, adding smiley face and angel emojis.

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Robert died at age 59 in September 2003 after battling esophageal cancer.

He shares Kourtney, Kim, Rob and 33-year-old daughter Khloe Kardashian with his ex-wife Kris Jenner, from whom he split in 1991.

"To the greatest of the great...miss you everyday!" Khloe said on the 14th anniversary of her dad's death in September.