Born in Manchester, Allen-Miller spent her early childhood in Moss Side, a southern inner-city area.
[2] Upon arriving in London, Allen-Miller's grandmother took her to Brixton Market to connect with her heritage and get "Jamaican spice or plantain or an Afro comb".
She left her job to form a creative duo with school friend and copywriter Lisa Turner-Wray, submitting portfolios to agencies and landing their first advertising gig with Anomaly in October 2014.
This was followed by Denai Moore's "Trickle" in 2017 as well as Allen-Miller's first short film Jerk in 2018, about an older man from the Windrush generation.
[10] Despite having mixed feelings on the genre, Allen-Miller's first feature film Rye Lane (2023) is a romantic comedy drama set in Peckham, south London.
Yates then recommended Allen-Miller to be the director for writers Nathan Bryon and Tom Melia's screenplay, originally set in Camden.
"[2] She considers Spike Lee and Martin Scorsese as prominent influences, as well as the films Beverly Hills Cop and Pretty Woman.
[1] For her debut feature film, Rye Lane, Allen-Miller wanted the female lead to be funny, and the world to feel more elevated and dreamlike.
[3] In December 2023, Allen-Miller married fellow filmmaker Freddie Waters at Lambeth Town Hall followed by a reception at the Camberwell Arms.