Catherine Called Birdy is a 2022 medieval comedy film written and directed by Lena Dunham, based on the 1994 novel of the same name by Karen Cushman.

It stars Bella Ramsey as the title character, alongside Billie Piper, Andrew Scott, Lesley Sharp, Joe Alwyn, and Sophie Okonedo.

Catherine, known as Birdy, is a fourteen-year-old English girl living in 13th-century Lincolnshire, England, with her father, Lord Rollo, mother, Lady Aislinn, and seventeen-year-old brother Robert.

The headstrong and rambunctious Birdy is attended by her nurse, Morwenna, and is friends with a peasant boy named Perkin who often joins in her antics.

In February 2021, it was announced that Dunham had scripted and would direct a film based on the children's novel Catherine, Called Birdy by Karen Cushman that was "her longtime passion project".

[4] At the end of March 2021, it was announced that Billie Piper, Andrew Scott and Bella Ramsey were included in the main cast.

The website's consensus reads, "Bringing a beloved book brilliantly to life, Catherine Called Birdy proves a well-told coming-of-age story can feel fresh regardless of the period setting.

[10] David Fear with Rolling Stone said the film was "the perfect mix of funny, irreverent and outraged," calling Dunham's adaptation "deliriously fun yet pointed," and lead actor Ramsey "a gift from the casting gods.

"[11] Giving the film four out of five stars, Adrian Horton with The Guardian acknowledged that "the midsection drags a bit," but concluded that "in Dunham’s hands, the throughline of enduring and discovering one’s worth, however historically imagined, is at once a comfort and a lark.