Kailia Posey died by suicide, her family has said.
The death of the 16-year-old, who starred in Toddlers and Tiaras, was confirmed by her mother on Tuesday.
And now her family has released a heartbreaking statement to TMZ to confirm the cause of death.
It read: "Although she was an accomplished teenager with a bright future ahead of her, unfortunately in one impetuous moment, she made the rash decision to end her earthly life."
The devastated family continued: "She won countless crowns and trophies after competing on the pageant circuit her entire life ... Her highly acclaimed talent as a contortionist had already led to professional touring job offers, and she had recently been selected to be a cheerleader at her high school next fall."
Kailia is also said to have had a love for aviation and had planned to continue her work in the entertainment industry while working towards her goal of a commercial pilot's licence.
The news of her death was first shared by her mum on Facebook on Tuesday in a statement which read: "I don't have words or any thoughts. A beautiful baby girl is gone.
"Please give us privacy as we mourn the loss of Kailia. My baby forever."
The star had celebrated her 16th birthday just a week earlier. She rose to fame on reality TV show Toddlers and Tiara, which followed youngsters and their parents as they competed in beauty pageants.
Her family has set up Kailia Posey Teen Crisis Intervention Fund in a bid to get 'much needed resources to students in crisis.'
Tributes to the teen poured in following the sad news.
Among those paying their respects was America's Got Talent magician Kadan Bart Rockett, who shared under one of Kailia's Instagram posts from April: "Can’t even believe this has happened. I’m praying for you guys to get through this. She always was so kind to all of us. Rest In Peace."
Another message from a pageant speaking coach who worked with her read: "I have experienced alot of loss in my life, but this one stings differently. Kailia was one the funnest and funniest young ladies that I have ever worked with in my coaching career.
*If you're struggling and need to talk, the Samaritans operate a free helpline open 24/7 on 116 123. Alternatively, you can email jo@samaritans.org or visit their site to find your local branch
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