Los Angeles, California - Hayden Panetittere's ex-fiancé Wladimir Klitschko previously sounded the alarm about her estate, and now, a particularly valuable keepsake has reportedly gone missing.

The late actor's precious engagement ring, which she received from Klitschko in 2013, has apparently vanished.

According to a source who spoke to Us Weekly, the high‑profile piece of jewelry – with great sentimental value – is suddenly nowhere to be found.

The ring is estimated to be worth around $500,000.

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Suspicion is rising among Panettiere's inner circle, as they believe someone may have taken it.

"Friends and family think that someone who was with her in her final days took it when they were pawning her things," the insider explained.

Panettiere's family had already expressed concern about her ex, Brian Hickerson, whom she was with at the time of her death.

Speaking to the New York Times, Panettiere's mom, Lesley Vogel, revealed that Hickerson had stolen and pawned some of the Nashville star's belongings, including a vintage guitar.

Vogel did not specify exactly when this allegedly took place, but the outlet said that Hickerson filed for bankruptcy back in 2022.

Brian Hickerson and his brother discovered Panettiere unconscious in a Greenville apartment and called 911.

Her death was later determined to have been an accidental overdose.

With the loss of the engagement ring, it now appears that exactly what Klitschko feared has come true.

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The boxing legend recently turned to a court in California to protect Panettiere's estate.

Because the former child star left no will, their shared daughter, 11-year-old Kaya, is considered the sole heir to her assets.