When is Caragh M. O'Brien's birthday?

Caragh M. O'Brien was born on January 1, 2000.

What is Caragh M. O'Brien's zodiac sign?

Caragh M. O'Brien is a Capricorn, born January 1, 2000.

What is Caragh M. O'Brien's Chinese zodiac sign?

Caragh M. O'Brien was born in 2000, the year of the Metal Dragon.

Where is Caragh M. O'Brien from?

Caragh M. O'Brien is from United States.

Where was Caragh M. O'Brien born?

Caragh M. O'Brien was born in Saint Paul, United States.

Where did Caragh M. O'Brien go to school?

Caragh M. O'Brien attended Johns Hopkins University, Williams College.

Is Caragh M. O'Brien still alive?

Yes — Caragh M. O'Brien is alive and 26 years old.

What is Caragh M. O'Brien's life-path number?

Caragh M. O'Brien's numerology life-path number is 4, derived from January 1, 2000.

BORN JANUARY 1· Writers Capricorn

Caragh M. O'Brien, 2000

Writers · January 1, 2000

Caragh M. O'Brien

Writers United StatesMetal Dragon★ SAINT PAUL

AGE26

BORNJan 1

★ UP NEXT

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★ Next birthday

165

days · turns 27

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★ HOW OLD IS CARAGH M. O'BRIEN?

Caragh M. O'Brien is 26 years old, born January 1, 2000 in Saint Paul · Capricorn.

#5933of 9,291 Writers on HotBirthdays

★ QUICK FACTS

The basics

★ BORN IN: Saint Paul
★ EDUCATED AT: Johns Hopkins University, Williams College

★ LEDE

About

Caragh M. O'Brien writes dystopian Young Adult fiction set in climate-ravaged worlds. Born in the US in 2000, she's best known for the Birthmarked trilogy. She also published an adult novel, Annie Bot, under the pen name Sierra Greer, exploring the inner life of a malfunctioning gynoid companion.

★ FEATURE

Biography

Caragh M. O'Brien is an American novelist born in 2000. She's best known for the Birthmarked trilogy, a series of Young Adult dystopian novels set in a world destroyed by climate change. Beyond that series, O'Brien expanded into adult fiction under the pen name Sierra Greer, writing Annie Bot, a novel centered on a malfunctioning gynoid companion. As a writer, she works across genres and age categories, crafting speculative worlds that explore survival and technology. Her work spans young adult and adult audiences, each exploring different dimensions of human experience in speculative settings.

★ SIDEBAR

Trivia

O'Brien published an adult novel, Annie Bot, under the pen name Sierra Greer rather than under her own name.
The Birthmarked trilogy, her most recognized work, centers on worlds reshaped by climate catastrophe.
She writes across both Young Adult and adult fiction genres.

★ HIGHLIGHTS

Career timeline

2025
- NOMINATEDArthur C. Clarke Award· Annie Bot

★ SIDEBAR

Numerology

4

LIFE-PATH NUMBER

The Builder

Disciplined and structured. Caragh M. O'Brien succeed where consistency beats charisma — long catalogs, repeatable craft, slow-grow audiences.

★ ALL LIFE-PATH 4 CELEBS →

★ ASTROLOGY

Birthday compatibility

By Chinese zodiac — san-he trine for best matches, opposing pair for the most friction-prone.

HIGHLY COMPATIBLE

Rae Lil BlackRat · 1996
Yung GravyRat · 1996
IsaacMonkey · 2004
Robbie UreMonkey · 2004
Seol In-ahRat · 1996

CHALLENGING

Alexander GouldDog · 1994
Jean-Carl BoucherDog · 1994
Connor JessupDog · 1994
Mayuko FukudaDog · 1994
Abbey HoesDog · 1994

Compare Caragh M. O'Brien side-by-side at /compare/<a>-vs-<b>.

★ FAQ

Frequently asked

How old is Caragh M. O'Brien?: Caragh M. O'Brien is 26 years old (born January 1, 2000).
When is Caragh M. O'Brien's birthday?: Caragh M. O'Brien was born on January 1, 2000.
What is Caragh M. O'Brien's zodiac sign?: Caragh M. O'Brien is a Capricorn, born January 1, 2000.
What is Caragh M. O'Brien's Chinese zodiac sign?: Caragh M. O'Brien was born in 2000, the year of the Metal Dragon.
Where is Caragh M. O'Brien from?: Caragh M. O'Brien is from United States.
What does Caragh M. O'Brien do?: Caragh M. O'Brien is a writer.
Where was Caragh M. O'Brien born?: Caragh M. O'Brien was born in Saint Paul, United States.
Where did Caragh M. O'Brien go to school?: Caragh M. O'Brien attended Johns Hopkins University, Williams College.
Is Caragh M. O'Brien still alive?: Yes — Caragh M. O'Brien is alive and 26 years old.
What is Caragh M. O'Brien's life-path number?: Caragh M. O'Brien's numerology life-path number is 4, derived from January 1, 2000.

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