Best Supporting Actress 2027: how the prediction market works
Kalshi and Polymarket US list a Best Supporting Actress market for the 99th Oscars. How it works, why a listed name isn't a nominee, and the dates to watch.
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Short answer
Kalshi and Polymarket US list a market on who wins Best Supporting Actress at the 99th Academy Awards on Sunday, March 14, 2027. Each performer is a separate outcome, and the market settles on the winner the Academy announces. On 27 October the lists included Anne Hathaway, Amanda Seyfried (for The Testament of Ann Lee) and Penélope Cruz.
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VENICECertain limitations apply. The offer is available to new users only, subject to the terms and conditions at kalshi.com/tc/500. 18+ only. Restrictions and eligibility requirements apply. Event contract trading involves significant risk and is not appropriate for everyone. Please carefully consider if it is appropriate for you in light of your personal financial circumstances. Kalshi products are not available in all jurisdictions. See kalshi.com/regulatory for more information.
Last checked November 12, 2026
How the contract works
Each performer is an outcome in one award market. A Yes position on a performer pays out if she wins under the market's rules, and a No position pays out if she doesn't. Only one name can win, so the outcomes split the category across every possible winner. The platform can add or change names as the season goes on.
From festival buzz to nominations
Acting races build through release dates, festival screenings, critics' reviews and guild awards. Supporting categories add one more question: category placement. A studio can campaign a role as lead or supporting, and that choice decides which race a performer is in. A name on the market's list is not a nominee. It only means the platform made her an outcome.
Dates to watch
- 11 to 15 January 2027: Academy members vote on nominations.
- 21 January 2027: nominees are announced, and the field narrows to the five who can win.
- 14 March 2027: the 99th Oscars ceremony.
Our Oscars 2027 guide has every category and date. For the top award, see our Best Picture 2027 market guide.
Where to find it
See Best Supporting Actress on Kalshi (opens in a new tab) See it on Polymarket US (opens in a new tab)
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Sources
Academy of Motion Picture Arts and Sciences and ABC, 99th Oscars dates (as on our Oscars 2027 page, checked 22 Oct 2026). Kalshi, "Oscar Winner: Best Supporting Actress" market page (checked 27 Oct 2026). Polymarket US, Oscars 2027 Best Supporting Actress market (checked 27 Oct 2026).
Frequently asked questions
Is the market's list the Academy's nominee list?
No. It's the platform's list of outcomes. The Academy announces nominees on January 21, 2027.
Who was on the list on 27 October?
Anne Hathaway, Amanda Seyfried and Penélope Cruz, among others. The live page can add or change names, so check it before you trade.
When is the ceremony?
Sunday, March 14, 2027. Nominations voting runs from January 11 to 15, 2027.
How does the market settle?
On the winner announced at the 99th Academy Awards. The rules on Kalshi and on Polymarket US both name the Academy of Motion Picture Arts and Sciences as the source. Read the rules on each market page before you trade.
21+ · T&Cs apply · Terms
Certain limitations apply. The offer is available to new users only, subject to the terms and conditions at kalshi.com/tc/500. 18+ only. Restrictions and eligibility requirements apply. Event contract trading involves significant risk and is not appropriate for everyone. Please carefully consider if it is appropriate for you in light of your personal financial circumstances. Kalshi products are not available in all jurisdictions. See kalshi.com/regulatory for more information.
