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Sienna Weir Biography: Age, Career, Family and More

F4U Editorial Desk • Updated October 15, 2026 • 2 min read

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Quick Info

Date of birth29 October 1999

Age23 (at time of death)

BirthplaceSydney, Australia

ProfessionModel; Editor

NationalityAustralian

Marital statusUnmarried (at time of death)

FamilyElder sister living in London

Sienna Weir Biography

Australian model and editor Sienna Weir rose to national attention as a finalist in Miss Universe Australia 2022. A lifelong horse rider and animal lover,她

Early life and background
Sienna Weir was born on 29 October 1999 in Sydney, Australia. Raised in Sydney, she developed a passion for horse riding at a very young age and began riding when she was three. She attended SCEGGS Darlinghurst in Sydney and went on to study at the University of Sydney, where she was completing a double degree in English Literature and Psychology in 2022.

Career
Weir pursued modelling during her university years, taking part in a number of photoshoots and becoming a contracted model with Scoop Management. Her modelling work and public profile grew through these engagements and she later combined her creative interests with editorial work. Beginning in 2021 she worked as an editor for social service organisations, including Toybox Australia and Pink Tank Events, contributing to initiatives aimed at supporting children facing serious illness.

Public profile
Sienna entered the national spotlight in 2022 when she was selected as one of 27 finalists in the Miss Universe Australia competition. During the contest she spoke about seeking larger opportunities and challenging herself, and mentioned plans to move to London to join family there. Her appearance in the contest brought wider recognition across Australia and among pageant audiences.

Personal interests and family
A devoted rider throughout her life, horse riding was a defining interest for Weir. She was known to be an animal lover and kept a pet cat named Alfie. Her favourite travel destination was Kyoto, Japan, and she had a particular fondness for Gothic literature and the poetry of Edgar Allan Poe. At the time of her death she was unmarried and had an elder sister who lives in London.

Death
On 2 April 2023, while practising at Windsor Polo Grounds in Sydney, Weir suffered severe injuries when her horse fell. She was taken to Westmead Hospital and remained under care for about a month. She died on 4 May 2023 at the age of 23 after medical teams withdrew life-sustaining treatment. Her passing prompted condolences from friends and followers who remembered her online.

Latest updates
Following her death, tributes and messages of sympathy were shared by people in her community and on social media. Her contributions as a model and as an editor for organisations supporting children were noted alongside remembrances of her lifelong connection to horse riding and animals.

Editorial Review and Sources

This F4U profile is written from publicly available career and profile information, then reviewed for clarity before publication. If you spot an outdated detail about Sienna Weir, send the page URL and a reliable correction source to f4udotin@gmail.com.

Reference context: StarsUnfolded

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Recent Work

Miss Universe Australia 2022 - Finalist

Selected as one of 27 finalists in the national pageant, gaining national recognition.

2022
Editor at Toybox Australia and Pink Tank Events

Worked as an editor for social service organisations supporting children with serious illness.

2021
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Career Highlights

  1. Finalist, Miss Universe Australia 2022
  2. Contracted model with Scoop Management
  3. Editorial work for Toybox Australia and Pink Tank Events
Reviewed by F4U Editorial Desk

F4U profile pages are prepared from public career information, checked for readability, and updated when reliable correction sources are shared with the editorial team.

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Frequently Asked Questions

When was Sienna Weir born?

Sienna Weir was born on 29 October 1999.

What is Sienna Weir known for?

Sienna Weir is known for model; Editor.

What is Sienna Weir’s marital status?

Sienna Weir's marital status is listed as Unmarried (at time of death).