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Biographical drama

On the Basis of Sex (2018): Cast, Ratings, Box Office & Plot

On the Basis of Sex (2018) movie poster

On the Basis of Sex is a 2018 biographical drama directed by Mimi Leder, starring Felicity Jones as Ruth Bader Ginsburg, Armie Hammer and Cailee Spaeny. It runs 2 hours and earned $38.8 million worldwide on a $20 million budget. Critics gave it 72% on Rotten Tomatoes and 59 on Metacritic, and IMDb users rate it 7.1/10.

IMDb rating
7.1/10
Rotten Tomatoes
72%
worldwide gross
$38.8M
Echo Score
64
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On the Basis of Sex (2018) movie poster
Released
Runtime
2h (120 min)
Director
Mimi Leder
Genres
Biography , Drama
Original language
English
Budget
$20M
After the credits
No No extra scene
The story

What Is On the Basis of Sex About?

The premise of On the Basis of Sex without spoilers. The whole story is in the plot summary further down.

Ruth Bader Ginsburg, a young lawyer and mother, challenges societal norms and confronts personal and professional obstacles while fighting for gender equality. Alongside her husband, Martin, she takes on a pivotal tax case that has the potential to fundamentally alter the legal system and establish her legacy as a champion for women’s rights. The case becomes a catalyst for a broader legal battle against gender discrimination.

On the Basis of Sex Themes & Keywords

· 50 tags
  • courtroom
  • misogyny
  • judge
  • teacher
  • caretaker
  • lawyer
  • human rights
  • marriage
  • inspired by a true story
  • american civil liberties union
  • women's rights
  • equality
+38 more
  • based on true story
  • father son relationship
  • law student
  • cancer
  • gender discrimination
  • ruth bader ginsburg character
  • reference to atticus finch
  • title spoken by character
  • younger version of character
  • mother daughter relationship
  • father daughter relationship
  • harvard law school
  • columbia law school
  • protest
  • demonstration
  • home care
  • u.s. constitution
  • law
  • overhead camera shot
  • 1950s
  • 1970s
  • feminism
  • women's equality
  • year 1956
  • cameo appearance by real life subject
  • rutgers university
  • year 1963
  • political rally
  • denver colorado
  • cat call
  • based on real person
  • female lawyer
  • typewriter
  • female protagonist
  • reference to gloria steinem
  • dorothy kenyon character
  • reference to welch v united states
  • reference to charles e. moritz v commissioner of internal revenue
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Cast & crew

On the Basis of Sex Cast & Characters

Felicity Jones leads the cast as Ruth Bader Ginsburg, with Armie Hammer as Martin Ginsburg and Cailee Spaeny as Jane Ginsburg. Directed by Mimi Leder; 19 actors are credited in all.

Also Starring in On the Basis of Sex

· 15 more
From the director

More from Mimi Leder

More films directed by Mimi Leder, best-rated first: Deep Impact, Pay It Forward, The Peacemaker and Thick as Thieves.

Full filmography
Ratings

On the Basis of Sex Reviews & Ratings

Critics gave On the Basis of Sex 72% on Rotten Tomatoes and 59 on Metacritic, and IMDb users rate it 7.1/10. Our Echo Score gives it 64/100, strongest in rewatch factor (71) and weakest in art & craft (60).

64 /100

On the Basis of Sex Echo Score Breakdown

On the Basis of Sex delivers a respectful account of Ruth Bader Ginsburg’s early legal career, balancing inspiring moments with a conventional biopic structure. The film’s narrative effectively conveys the protagonist’s perseverance, though its narrow temporal focus and predictable pacing limit narrative surprise. Performances are generally solid, with the lead providing measured portrayal amid stronger supporting turns. While the technical execution and sensory design support the drama competently, neither element stands out. As a result, the production offers a meaningful yet familiar examination of a landmark figure.

Our own 0–100 rating, built from five aspects: art, character, story, the sensory experience and how well a film rewatches.

  • Art & Craft 60

    The film’s technical execution is serviceable but unremarkable. Direction adheres to conventional biopic framing with measured camera setups and predictable editing rhythms. Production design captures the period detail accurately, although visual motifs seldom depart from familiar tonal palettes. The cinematography maintains clarity but lacks striking visual flourishes. Overall, the film’s craft supports the narrative without drawing particular attention.

  • Character & Emotion 63

    When it comes to acting and emotional resonance, performances are generally solid but uneven. Felicity Jones delivers a measured portrayal that commands attention, yet some viewers found her interpretation constrained and lacking spontaneity. Armie Hammer and supporting cast members provide consistent support with moments of genuine chemistry, although emotional depth occasionally feels underexplored. As a result, character engagement remains moderate, sustaining interest without fully immersing the audience.

  • Story & Flow 63

    In terms of plot coherence and pacing, the narrative follows a conventional biographical structure that highlights key legal battles with clarity but little innovation. Early segments establish the protagonist’s challenges effectively, yet the focus on a narrow time span limits broader thematic exploration. While the central arc maintains engagement, scenes of legal exposition sometimes slow momentum. Ultimately, the storyline offers an inspiring account of perseverance, albeit within familiar biopic conventions.

  • Sensory Experience 63

    Regarding sensory elements, the film presents a clean audio mix and an unobtrusive score that supports dramatic moments without overwhelming them. Sound design maintains intelligibility during courtroom dialogues, though there are no standout auditory motifs. Visually, the production employs a consistent but muted color palette that evokes the period setting, yet it lacks distinctive stylistic flair. Overall, the sensory experience is functional and coherent, serving the story without sensory highlights.

  • Rewatch Factor 71

    The rewatch factor is modest given the film’s straightforward approach. The inspiring true story and competent performances offer a degree of repeat appeal for viewers interested in legal history or biographical drama. However, predictable narrative beats and the absence of surprising stylistic elements may limit enthusiasm for multiple viewings. While the thematic importance of gender equality sustains relevance, the overall replay value rests primarily on the audience’s interest.

Plot

On the Basis of Sex Plot Summary

What happens in On the Basis of Sex from start to finish, spoilers included, with a timeline of 15 key events. The opening is below; the full summary is a 3-minute read.

Spoilers ahead

In 1956, Ruth Bader Ginsburg, portrayed by Felicity Jones, embarks on her first year at Harvard Law School. While she diligently attends her own classes, she also takes on the responsibility of attending her husband Martin’s lectures, played by Armie Hammer, who is in his second year but has fallen ill due to cancer. Amidst her academic pursuits and caring for their infant daughter Jane, represented by Cailee Spaeny, Ruth shows remarkable resilience.

Full summary

The whole story of On the Basis of Sex, scene by scene

Read the full summary
Box office

On the Basis of Sex Box Office & Budget

On the Basis of Sex grossed $38.8 million worldwide on a $20 million budget, 1.9 times what it cost. $24.7 million came from the US and Canada and $14.1 million (36%) from the rest of the world.

2018 box office

Worldwide gross

$38.8M

1.9× its budget

US & Canada
$24.7M
International
$14.1M
Budget
$20M
US & Canada 64% Rest of the world 36%
Videos

On the Basis of Sex Trailers & Videos

8 videos: 3 trailers and 5 clips.

All 8 videos
Official Trailer
  • Trailer Official International Trailer
  • Trailer Official Trailer 2
  • Clip ON THE BASIS OF SEX - "At The Same Time" Clip - In Theaters Christmas Day
  • Clip ON THE BASIS OF SEX - "I Apologize Ok" Clip - In Theaters Christmas Day
Quiz

How Well Do You Know On the Basis of Sex?

10 questions about the story, each with a hint if you get stuck. Pick an answer to see whether you were right.

Question 1 of 10

  1. Question 1: not answered
  2. Question 2: not answered
  3. Question 3: not answered
  4. Question 4: not answered
  5. Question 5: not answered
  6. Question 6: not answered
  7. Question 7: not answered
  8. Question 8: not answered
  9. Question 9: not answered
  10. Question 10: not answered

What year did Ruth Bader Ginsburg attend Harvard Law School?

Cars

Cars in On the Basis of Sex

24 cars on screen, including the 1967 Cadillac Fleetwood 60 Special Brougham and the 1970 Checker Taxicab.

All 24 cars
  • 1967 Cadillac Fleetwood 60 Special Brougham in On the Basis of Sex 1967 Cadillac Fleetwood 60 Special Brougham Minor role
  • 1970 Checker Taxicab in On the Basis of Sex 1970 Checker Taxicab Minor role
  • 1965 Dodge Polara in On the Basis of Sex 1965 Dodge Polara Minor role
  • 1967 Plymouth Fury in On the Basis of Sex 1967 Plymouth Fury Minor role
Details

On the Basis of Sex Also Known As

27 alternative titles, including “온 더 베이시스 오브 섹스” and “Suprema”.

Also known as
  • 온 더 베이시스 오브 섹스
  • Suprema
  • 法律女王
  • La voz de la igualdad
  • Una cuestión de género
  • 세상을 바꾼 변호인
  • По половому признаку
  • Дискриминация по полов признак
  • Eşitlik Savaşçısı
  • Une femme d'exception
  • המין החזק
  • Η Αρχή Της Ισότητας
+15 more
  • En kvinna bland män
  • Die Berufung - Ihr Kampf für Gerechtigkeit
  • За статевою ознакою
  • 司法女王
  • Az egyenjogú nem
  • Una giusta causa
  • 性别为本
  • Uma Luta Desigual
  • Oikeuden puolesta
  • Lupta pentru egalitate
  • Dzimuma dēļ
  • Nes ji yra moteris
  • ビリーブ 未来への大逆転, გენდერული თანასწორობა
  • สตรีพลิกโลก
  • Per raó de sexe

Seen On the Basis of Sex?

FAQ

On the Basis of Sex FAQ: Cast, Box Office & Runtime

Runtime, release date, director, cast, box office, ratings and post-credit scenes of On the Basis of Sex, each answered in a sentence.

How long is On the Basis of Sex?

On the Basis of Sex runs 2 hours (120 minutes).

When was On the Basis of Sex released?

On the Basis of Sex was released on December 25, 2018.

Who directed On the Basis of Sex?

On the Basis of Sex was directed by Mimi Leder.

More films by Mimi Leder

Who is in the cast of On the Basis of Sex?

On the Basis of Sex stars Felicity Jones as Ruth Bader Ginsburg, Armie Hammer as Martin Ginsburg and Cailee Spaeny as Jane Ginsburg, among 19 credited actors.

How much did On the Basis of Sex make at the box office?

On the Basis of Sex grossed $38.8 million worldwide ($24.7 million domestic, $14.1 million international) on a budget of $20 million.

How is On the Basis of Sex rated?

On the Basis of Sex has 7.1/10 on IMDb, 72% on Rotten Tomatoes, 59 on Metacritic and 74% on TMDB.

Does On the Basis of Sex have a post-credit scene?

No. On the Basis of Sex has no extra scene during or after the credits.

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