Hayden Panettiere's Brother Jansen's Cause of Death Revealed As Family Breaks Silence

Jansen Panettiere died of an enlarged heart, his family shared.

A cause of death has been revealed for Hayden Panettiere's brother Jansen.

In a statement to ABC News, the Panettiere family shared the medical examiner "reported Jansen's sudden passing was due to cardiomegaly (enlarged heart), coupled with aortic valve complications."

"We sincerely appreciate the outpouring of love and support towards our family as we navigate this unthinkable loss, and ask that we be gifted our privacy during this time of mourning," the statement continued. "We love you so much Jansen and you will be in our hearts forever."

The family also paid tribute to the late actor, writing, "Jansen’s heart could be seen in his eyes, and his charm in his brilliant, engaging smile; his soul in his masterful and revealing paintings, and the joy of life in his dry wit."

They added, "His charisma, warmth, compassion for others, and his creative spirit will live forever in our hearts and in the hearts of all whom he encountered."

Jansen died on Sunday, Feb. 19, at home in New York. The actor had followed his older sister's footsteps, with roles in Even Stevens, The Walking Dead, and Everybody Hates Chris. He also appeared alongside his sister in Tiger Cruise, the 2004 Disney Channel Original Movie that gave Hayden her breakout role.

Besides being an actor, Jansen was a talented artist. Before his passing, he made a collection of clothing featuring his art. Three percent of all purchases went to non-profit organization #WeAreAllUkrainians, that provides relief to Ukrainian citizens and gives support to Ukrainian refugees in Germany.