Smith's personal attorney, Howard K. Stern, and several other men had also claimed to be the baby's father. The case made international headlines.

On Feb. 8, 2007, Smith, who struggled with prescription drugs, was found dead in a Florida hotel room. An investigation ruled the official cause of death to be an accidental overdose. Smith was 39. Dannielynn was just 5 months old at the time.

\"PHOTO:
Scott Suchman/WireImage/Getty Images, FILE
PHOTO: Former Playboy Playmate Anna Nicole Smith and her attorney Howard Stern leave the Supreme Court in Washington, D.C., Feb. 28, 2006.
>

Birkhead said that in this documentary, \"Hopelessly in Love: Anna Nicole Smith and Larry Birkhead,\" viewers will see never-before-seen moments with Smith, including when she and Birkhead first met at the Barnstable Brown Kentucky Derby party.

\"We went back through the vaults and of all the tapes and archives ... you'll see when sparks flew and you'll also hear about when dishes flew and everything else in between,\" he said.

FIRST LOOK at a brand new Anna Nicole Smith documentary with @larrybirkhead.#HopelesslyInLovehttps://t.co/v50eSHtnwd pic.twitter.com/Clbghj2kJ6

— Good Morning America (@GMA) January 14, 2020

\"You'll also hear Anna for the first time, publicly acknowledge that we were in a relationship because I didn't get that ... I was always behind the scenes so it was important for me. Not just to share it with the audience and the viewers, but also to hope that my daughter sees this one day.\"

View this post on Instagram

A post shared by Larry Birkhead (@larryanddannielynn) on Jun 28, 2019 at 12:23pm PDT

\"PHOTO:
Kevin Winter/DMI/The LIFE Picture Collection via Getty Images
PHOTO: Anna Nicole Smith in 1994.
>

Birkhead said Dannielynn, now 13, would pop in during the editing process of the documentary.

\"She came in and was peeking around the corner and all of a sudden [in a clip] Anna grabs me and kisses me and she said 'Oh that's cringy, Dad. Turn that off,'\" Birkhead laughed.

\"I hope I can put that in a box for her along with the warehouse of size 10 shoes and dresses ... and hope that she can watch it someday.\"

View this post on Instagram

A post shared by Larry Birkhead (@larryanddannielynn) on May 4, 2019 at 9:10am PDT

\"Hopelessly in Love: Anna Nicole Smith and Larry Birkhead\" premieres Friday, 9 p.m. EST/PST on Lifetime. 

ABC News and Lifetime are part of the Walt Disney company.

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