Larry Birkhead honored his former girlfriend in an Instagram post yesterday on the 15th anniversary of the actress's death.

Birkhead, 49, shared a black and white picture of the pair embracing from years ago. He captioned the photo,

"Still remembering this one 15 years after her death. She was truly one of a kind. She struggled for love and acceptance. Just when she found a little piece of one or the other, life seemed to sabotage."

He continued,

"Today, I remember your heart, your soul and your beauty, both inside and out. Your love is alive still to this day, in the form of a truly one of a kind teenager with her Mom’s smile, beauty and courage."

Birkhead concluded with a message for Anna's fans,

"Thanks to Anna’s fans for helping keep her memory alive. We love you Anna Nicole."

Smith first shot to fame when she was awarded the title of 1993 Playmate of the year in Playboy Magazine. The model later became known for her marriage to 89-year-old oil tycoon J. Howard Marshall II. She also appeared on The Anna Nicole Show from 2002-2004.

In 2007, Smith died after an accidental prescription drug overdose. Smith was found unresponsive in her hotel room at the Hard Rock Hotel and Casino in Hollywood, Florida, where she was vacationing with her partner at the time Howard K. Stern.

Anna Nicole, who was just 39, was later pronounced dead when she arrived at the Memorial Regional Hospital.

Just five months prior, Smith had given birth to her and Birkhead's daughter Dannielynn.

Three days after the birth of Dannielynn, Anna Nicole Smith's oldest son Daniel, who was 20, died of an accidental drug overdose himself in his mother's hospital room in the Bahamas.

"You've got to think: My daughter was born on Sept. 7 and on Sept. 10, Daniel died," Birkhead said in a 2017 interview. "So you go from that extreme high and low, and how do you process that in your mind? Although her death certificate will list a different cause — an accidental overdose — in my mind, I think she truly died of a broken heart."

Dannielynn, 15, and her father appeared in a February 20/20 special last year that saw the pair take a trip to Anna Nicole Smith's hometown of Mexia, Texas so Dannielynn could learn more about her mother.

"Dannielynn has no idea that she's going to see these things. All this is a surprise," said Birkhead in the special as they looked at some of Smith's personal belongings. "She has a big heart like her mom had, I think she could appreciate these things."

Birkhead continued,

"When we talk about Anna Nicole, there were a lot of happy moments for her. There were a lot of highs before there were a lot of lows." He added, "Anna should be remembered as this larger than life figure that was really a caring, giving person. A beautiful lady who loved her fans and loved her family."