Carrie Fisher's Daughter Billie Lourd Remembers Grandma Debbie Reynolds

The late Carrie Fisher's daughter Billie Lourd took to Instagram on Saturday to remember her grandma Debbie Reynolds on what would have been the star's 85th birthday.

Reynolds was born on April 1, 1932, but sadly, the Singin' in the Rain actress didn't reach the 85 year milestone. Instead, she died last December just a day after her daughter Fisher in a Hollywood shocker.

Lourd, 24, captioned a photo of Reynolds wearing a green sweater and pants with Fisher standing behind her, "Happy 85th to my constantly classily clad Abadaba."

As RadarOnline.com has reported, Reynolds died at age 84 on Dec. 28, just one day after her "Star Wars" actress daughter Fisher passed away at age 60. Fisher had been rushed to a Los Angeles hospital after having a heart attack on an airplane  coming home from London.

Carrie's brother, Todd Fisher, has said his niece Lourd is "genetically Carrie and Debbie" and that her father, CAA agent Bryan Lourd, has been her rock: "He has supported her beautifully."

Todd told ET of Billie, "She is a lot more like my mother even than Carrie."

Lourd raised eyebrows by wearing a bikini in Cabo while on a getaway with boyfriend Taylor Lautner not long after Fisher and Reynolds' deaths, as RadarOnline.com has reported.

But fans understand the pressure young Lourd has been under as she copes with the deaths of her both her famous mom and grandma.

Last weekend, fans honored both Reynolds and Fisher's storied lives in an emotional public memorial in which Fisher's former fiancé Dan Aykroyd paid tribute.