The Lion's Mouth Opens poster
Where to stream

The Lion's Mouth Opens

8.0201428mMovieDocumentary

A documentary on filmmaker Marianna Palka, as she confronts her risk of Huntington's Disease.

DirectorLucy Walker
WriterMarianna Palka
ProducerLucy Walker

Where to watch

Amazon Prime VideoAmazon Prime VideoAmazon Prime Video with AdsAmazon Prime Video with Ads
Availability shown for United Kingdom · rights vary by country

Cast · Directed by Lucy Walker

MPMarianna Palka
Marianna Palka
JRJason Ritter
Jason Ritter
BHBryce Dallas Howard
Bryce Dallas Howard
Herself
SGSeth Gabel
Seth Gabel
Himself
MH
Moet Hashimoto
CR
Carly Ritter
MUMichael Uppendahl
Michael Uppendahl
CWChristian Williams
Christian Williams
Himself

More from Marianna Palka · Lead actress

Good Omens
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GLOW
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2017 · 7.3
Contracted: Phase II
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2015 · 5.4
Payback - The Debt Collector
Payback - The Debt Collector
2021 · 5.2
Good Dick
Good Dick
2008 · 5.9
Bitch
Bitch
2017 · 5.3
We Are Boats
We Are Boats
2019 · 5.5
Neds
Neds
2010 · 6.7
Pant Suits
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2015 · 6.0
Love, Danielle
Love, Danielle
2024
See all fromMarianna Palka

More from Jason Ritter · Co-star actor

Law & Order
Law & Order
1990 · 7.3
Law & Order: Special Victims Unit
Law & Order: Special Victims Unit
1999 · 8.0
Lanterns
Lanterns
2026 · 8.3
Person of Interest
Person of Interest
2011 · 8.1
The Last of Us
The Last of Us
2023 · 8.4
Gravity Falls
Gravity Falls
2012 · 8.6
Superstore
Superstore
2015 · 7.5
Amphibia
Amphibia
2019 · 8.6
Parenthood
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2010 · 7.5
Goliath
Goliath
2016 · 7.6
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More from Lucy Walker · Director

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Blue's Clues
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1996 · 7.7
The New Yorker Presents
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How to Change Your Mind
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Blindsight
Blindsight
2006 · 6.8
Waste Land
Waste Land
2010 · 7.6
Countdown to Zero
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2010 · 6.3
Mountain Queen: The Summits of Lhakpa Sherpa
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2024 · 7.6
Buena Vista Social Club: Adios
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2017 · 7.3
Bring Your Own Brigade
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2021 · 9.0
See all fromLucy Walker

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The Lion's Mouth Opens — streaming FAQ

Which OTT platform streams The Lion's Mouth Opens?

The Lion's Mouth Opens is streaming on Amazon Prime Video in United Kingdom, and available to rent or buy on Amazon Video. It's not currently on Netflix.

Is The Lion's Mouth Opens on Netflix?

No, The Lion's Mouth Opens is not on Netflix in United Kingdom as of September 2026. It's currently on Amazon Prime Video.

Is The Lion's Mouth Opens on Amazon Prime Video?

Yes — The Lion's Mouth Opens is included with an Amazon Prime Video subscription in United Kingdom as of September 2026.

Where can I watch The Lion's Mouth Opens for free?

The Lion's Mouth Opens is available on Amazon Prime Video in United Kingdom, but you'll need an active subscription — there's no free option right now.