Nancy Cartwright: Voice of Bart Simpson, Net Worth & Family Facts

Most people know Bart Simpson’s catchphrases but wouldn’t recognize the woman behind his voice. Nancy Cartwright has voiced that 10-year-old for nearly the entire run of The Simpsons, and this article separates verified career facts from viral rumors — the Sabrina Carpenter connection, Scientology reports, and paycheck estimates — all with named sources attached.

Born: October 25, 1957, Dayton, Ohio ·
Known for: Voice of Bart Simpson since 1987 ·
Net worth estimate: $90–$100 million ·
Episodes voiced: Over 700 ·
Award: Primetime Emmy for Outstanding Voice-Over Performance (1992) ·
Book: My Life as a 10-Year-Old Boy (2000)

Key facts

Ten biographical entries, one pattern: the official record is consistent on career milestones and silent on money.

The pattern holds: milestones are sourced, while net worth and salary stay estimates because Cartwright’s contracts are private. Treat any financial figure as a projection, not a disclosure.

How is Sabrina Carpenter related to Nancy Cartwright?

The internet loves a celebrity-family reveal, and this one started with Cartwright’s own TikTok. In 2024, the South China Morning Post (Hong Kong daily) reported that Cartwright is Carpenter’s aunt, and the entertainment site Digital Spy quoted the caption that set social media alight: “The rumors are true! Sabrina Carpenter is my niece!”

Is Carpenter actually Cartwright’s niece? Yes — with an asterisk. Celebrity news site The List reports that Cartwright clarified how the link works: Carpenter’s grandmother married Cartwright’s father. The connection is real, but it runs through a marriage, not shared blood.

The implication: “aunt” was shorthand for a real but indirect connection. The verified part is the marriage link and Cartwright’s own post; the blood relation is zero.

What voices does Nancy Cartwright do?

One voice, half of Springfield’s playground. The official FOXFLASH cast bio lists Bart Simpson, Ralph Wiggum, Nelson Muntz, Rod Flanders, Maggie Simpson, Database, and Kearney under Cartwright’s name. Beyond Springfield, IMDb (film and TV database) records her in The Critic, Rugrats, and other animated series.

• Bart Simpson — flagship role, voiced continuously since the late 1980s.
• Ralph Wiggum, Nelson Muntz, Rod Flanders, Maggie, Database, Kearney — the extended Springfield roster.
• The Critic, Rugrats — additional animated credits beyond The Simpsons.

Before Springfield, Cartwright worked in radio in Ohio and put together a demo reel with voice legend Daws Butler — the tape that opened animation doors, according to Fandango’s biography page.

Is Bart Simpson autistic?

• No on-screen diagnosis: the series has never labeled Bart as autistic.
• Creator Matt Groening has said Bart was written as a mischievous kid, not a clinical case.
• The fan theory persists because Bart’s impulsiveness and school struggles feel recognizably neurodivergent.

That reading is understandable, but it is interpretation, not canon. The show rarely assigns formal diagnoses, and Bart’s behavior has always been treated as personality rather than condition.

What is Bart Simpson’s actual IQ?

• In “Bart the Genius” (Season 1), the test gives Bart a score of 105.
• Later episodes vary, usually settling in the average to slightly-above-average range.
• The episode title is the joke: 105 is not genius territory.

The on-screen number is 105, and the show has never bothered to keep strict continuity on Bart’s intelligence since.

The pattern: Cartwright’s range is a one-woman children’s theater inside a sitcom that never recasts its kids. The autism and IQ questions show how much fans treat Bart as a real person — but the record confirms a mischievous character, not a diagnostic profile.

How much money did Nancy Cartwright make from The Simpsons?

How much does a permanent 10-year-old earn? Published reports estimate that after the principal cast’s 2004 contract renegotiation, Cartwright’s rate reportedly reached about $300,000 per episode in later seasons. Celebrity-wealth trackers put her net worth between $90 million and $100 million.

Editor’s note: These figures are estimates from published reports, not official disclosures. Cartwright has not published financial statements.

• Simpsons salary: roughly $300,000 per episode in later seasons (reported, not contract-confirmed).
• Net worth: $90–$100 million (estimated, not disclosed).
• Other income: royalties, book sales, and her podcast.

The trade-off: big pay gives Cartwright independence, but it also makes her a fixed cost in every renewal — and it keeps her actual numbers private.

Does Nancy Cartwright still do Bart Simpson’s voice?

Yes — as of 2025, Bart still sounds like he always has. The film and TV database IMDb describes Cartwright as Bart’s voice for over three decades on a series it calls the longest-running scripted show of all time.

She has recorded for Season 35 and beyond, and no retirement announcement exists. Cartwright has said in interviews that she still enjoys the role.

The catch: every renewal resets the same question — how long can anyone keep voicing a 10-year-old? Cartwright’s public answer so far is that she has no plans to stop.

Which Simpsons voice actors have passed away?

A show that runs this long eventually buries some of its best voices. The most prominent losses include three actors whose characters became fan favorites.

• Marcia Wallace — Edna Krabappel; died 2013.
• Phil Hartman — Lionel Hutz and Troy McClure; died 1998.
• Doris Grau — Lunchlady Doris; died 1995.

Meanwhile, the principal cast — Dan Castellaneta, Julie Kavner, Harry Shearer, Nancy Cartwright, Yeardley Smith, and Hank Azaria — were all still alive as of 2025. That continuity underlines why IMDb’s entry calls the series the longest-running scripted show of all time.

Why this matters: The Simpsons rarely recasts iconic roles. When Wallace, Hartman, and Grau died, the show wrote their characters out or retired them rather than replace the voices.

What’s confirmed — and what’s still rumor

The line between documented fact and circulating rumor is easy to blur. Here is the split.

Confirmed facts

• Cartwright won the Primetime Emmy for Outstanding Voice-Over Performance in 1992 (Television Academy’s official interview archive).
• The Sabrina Carpenter connection runs through a grandparent’s marriage, as The List (celebrity news site) reports.
• She came up through Ohio radio and a Daws Butler demo reel (the movie database Fandango).
• She hosts the Simpsons Declassified podcast (Wikipedia’s entry).

Still unconfirmed or unclear

• Net worth: $90–$100 million is an estimate, not a disclosure.
• Per-episode salary: roughly $300,000 in later seasons is reported, not confirmed.
• Scientology donations: the South China Morning Post reported millions in 2024, but no itemized breakdown exists.
• The “Bart is autistic” reading is fan interpretation; the show has never confirmed it.
• Any retirement date for Bart’s voice actor: none announced.

The balance of evidence: career milestones are anchored and consistent, while money, religion, and retirement are the soft spots. Treat unanchored claims about Cartwright as rumors until a solid source appears.

In her own words

“I never thought of Bart as a boy… I just thought of him as a character.”

— Nancy Cartwright, NPR interview

“I just let my voice drop into a kid’s voice.”

— Nancy Cartwright, My Life as a 10-Year-Old Boy

“The rumors are true! Sabrina Carpenter is my niece!”

— Nancy Cartwright, TikTok caption, as quoted by Digital Spy (entertainment outlet)

“The longest-running scripted TV series in history.”

— The Simpsons’ official press pages

The through-line: Cartwright treats Bart as a character to serve, not a brand to manage — which may be exactly why the voice has lasted this long.

The takeaway

The public record on Cartwright is consistent where it matters: she has voiced Bart Simpson since the Tracey Ullman era, won an Emmy, published a memoir, and still records new episodes as the show passes its 35th season. The soft spots are financial and forward-looking — net worth, per-episode salary, and retirement timing all rest on reporting rather than disclosure. For The Simpsons’ producers, the implication is clear: keep Cartwright in the booth as long as she wants the job, because there is no version of the show without Bart’s voice.

Frequently asked questions

Related reading: The List — how the Sabrina Carpenter family connection actually works