Few pieces of punctuation get people’s blood pumping like the Oxford comma.

The serial comma, as it’s also known, comes before the coordinating conjunction (such as “and” or “or”) in a written list of more than two things. The comma makes the all-important difference between: “I ate soup, cabbage and jelly beans,” and “I ate soup, cabbage, and jelly beans.”

Some say it helps avoid ambiguity, while others say it’s redundant.

And as the Twitter account @CelebrityOxford shows, it’s not just your middle-school English teacher who cares about the contentious comma. Film actors and sci-fi legends have opinions on the matter, too.

@CelebrityOxford has been diligently probing writers and actors to take a side in the Oxford comma debate since October 2014. Rick Mueller, a writer based in Tennessee, appears to be behind the account. (He’s pro.)

Comedian Stephen Fry was one of the first to reply:

@CelebrityOxford in subclauses an and would follow a comma. In lists I’m ambivalent. Conan Doyle used them, Wilde surprisingly didn’t …

— Stephen Fry (@stephenfry) October 14, 2014

The account receives far fewer replies than it sends requests. But the majority of those who do reply are firmly in favor, including actor Lupita Nyong’o, writer Neil Gaiman, and Yahoo exec Marissa Mayer.

.@CelebrityOxford that comma left Oxford a long time ago: I found it in Kenya, and I won't go without it! – LN #OxfordComma

— Lupita Nyong'o (@Lupita_Nyongo) December 20, 2014

@CelebrityOxford big fan.

— Alexis Ohanian 🗽 (@alexisohanian) October 17, 2014

@CelebrityOxford I stand with my parents, Charles Darwin, and God.

— Neil Gaiman (@neilhimself) November 28, 2014

@CelebrityOxford Always! On @yahoo blog posts, tho, they get taken out for stylistic consistency. :/

— marissamayer (@marissamayer) December 11, 2014

@CelebrityOxford What’s my stand on the Oxford comma, you ask? I would never read, write, or even think of a list without it.

— Neil deGrasse Tyson (@neiltyson) November 27, 2014

@CelebrityOxford Pro.

— William Gibson (@GreatDismal) January 1, 2015

@CelebrityOxford Obviously I'm pro-comma. But now you have the Oxford Comma song stuck in my head. https://t.co/akET1gutGe

— Meg Cabot (@megcabot) December 17, 2014

Two American ’90s stars agree:

I'm a fan, an advocate, and a celebrant of the #OxfordComma. https://t.co/wAgiEMcmxg

— KevinSmith (@ThatKevinSmith) August 9, 2015

“@CelebrityOxford: Super important question: where do you stand on the use of the Oxford Comma?”

100% in favor. What are we, animals?

— James Van Der Beek (@vanderjames) October 17, 2014

Some, like Fry, are ambivalent:

I arm-wrestle with my copy editor all the time over punctuation, since — like a lot of writers — I write by ear. Depends on the meaning… https://t.co/s2WMXBo3bD

— Margaret E. Atwood (@MargaretAtwood) May 3, 2017

… and where you want the voice pause to come. Neither of us wins all the time. https://t.co/s2WMXBo3bD

— Margaret E. Atwood (@MargaretAtwood) May 3, 2017

“@CelebrityOxford: @judyblume Super important question; where do you stand on use of Oxford Comma?”-Been thinking a lot about this lately.

— Judy Blume (@judyblume) December 13, 2014

Others are vehemently anti-serial comma:

@CelebrityOxford Against…

— Don Cheadle (@DonCheadle) January 18, 2015

@CelebrityOxford fuck the Oxford comma. Just structure your sentences with more clarity!

— Talib Kweli Greene (@TalibKweli) October 29, 2015

And some people’s opinions are strong, yet unclear:

@CelebrityOxford in twitter, use it, whenever, and wherever, you please ,,,

— Freddie Prinze Jr (@RealFPJr) October 15, 2014

@CelebrityOxford I don't like him

— Sinbad (@sinbadbad) October 17, 2014

@CelebrityOxford 'I love it'

— Louie Anderson (@LouieAnderson) October 16, 2014