Acting In 2019, Anders made his feature film debut at the age of 15 with a small part as Private Willock in the war drama
1917, directed by his father,
Sam Mendes. He was credited as "Joe Mendes" in the film. In 2022, he changed his
stage name to Joe Anders and had a small part in the
Channel 4 television drama film
I Am Ruth (2022), directed by
Dominic Savage, appearing alongside his mother
Kate Winslet and his sister
Mia Threapleton, portraying their son and brother, respectively. In 2023, Anders had a small part as an American soldier in the biographical war drama
Lee, directed by
Ellen Kuras, and had his first leading role in the musical coming-of-age romantic comedy
Bonus Track, directed by Julia Jackman. For his performance in
Bonus Track, he was longlisted for the
British Independent Film Awards in the
Breakthrough Performance category, but did not get the nomination. In October 2024, Anders joined the cast of
Zoe Kazan's upcoming miniseries
East of Eden, adapted from
John Steinbeck's 1952
novel of the same name. In May 2025, Anders joined the cast of
Apple TV+'s series
Cape Fear.
Writing and music Anders is also a musician and learned how to play the piano in 2020 during the
COVID-19 lockdown. In 2024, he composed the score for Mike Gilbert's short film
Big Cat. At the age of 19, Anders attended a screenwriting course at the
National Film and Television School in Beaconsfield, England, where he wrote the screenplay for the British family drama film
Goodbye June (2025), inspired by the death of his maternal grandmother when he was 13 years old. The film marks both Anders' screenwriting debut and Winslet's directorial debut, and was released by
Netflix on 24 December 2025. == Filmography==