Greta Thunberg is 23 years old as of October 2026. She was born on 3 January 2003.
Swedish activist who began a solo school strike for climate at 15 in 2018, inspiring a global youth movement
Did you know?To avoid the high carbon emissions of flying, she sailed across the Atlantic on a solar-powered racing yacht to attend a climate conference.
Quick facts
Date of birth3 January 2003
Age23
NationalitySwedish
BirthplaceStockholm, Sweden
Occupationenvironmentalist, author, activist
Editor's Take:
Greta Thunberg showed that one determined teenager could change a global conversation. Her lone protest outside the Swedish parliament grew into a worldwide movement of school strikes. She spoke bluntly to world leaders, often more bluntly than adults dared. Supporters see her as a moral voice for a generation, while critics question her methods. Either way, she reshaped how young people engage with climate politics.
Key Milestones
2018: School strike – begins in Stockholm
2018: COP24 – speaks in Poland
2019: UN Climate Summit – "How dare you" speech
2019: Time Person of the Year – youngest ever
Greta Tintin Eleonora Ernman Thunberg (born 3 January 2003) is a Swedish activist known for pressuring governments to address climate change and social issues.
Greta Thunberg's birthday is January 3. She was born on January 3, 2003 in Stockholm, Sweden.
How old is Greta Thunberg?
Greta Thunberg is 23 years old, and turns 24 on her next birthday, January 3.
Who shares a birthday with Greta Thunberg?
Famous people who share Greta Thunberg's January 3 birthday include J. R. R. Tolkien, Michael Schumacher, Mel Gibson, Clement Attlee and Sofia Kovalevskaya.
