Milla was the winner of the Linbury Prize for Stage Design in 2015. Other Awards include the Lord Williams Prize for Design and The Prince of Wales Design Scholarship

Designs include: 42 Balloons (The Lowry); Mates in Chelsea, Inside Bitch, Bad Roads, B and Human Animals (Royal Court); Cat On A Hot Tinned Roof (The Royal Exchange); Macbeth (The Reykjavik City Theatre in Iceland), Samuel Takes a Break (The Yard Theatre); Bootycandy, A Small Place (Gate Theatre, London), costumes for Shooting Hedda Gabler (Rose Theatre); Red Ellen (Northern Stage), Ivy Tiller: Vicar’s Daughter, Squirrel Killer, and O, Island! (Mischief Festival for Royal Shakespeare Company), Isla (Theatr Clwyd), La Traviata (Nevill Holt), costumes for La boheme (ENO: Drive & Live) The Brief and Frightening Reign of Phil (Co-Designed with Chloe Lamford for The New Zealand Festival Theatre); Yolk and Aliens (Co-Created with Jane Horrocks, Molly Vivian and Francesca Levi for Brighton Festival); Curious (Co-designed with Rosie Elnile for Soho Theatre), Mr Burns and Gone Too Far (Guildhall); There Are No Beginnings (Leeds Playhouse); A Midsummer Night’s Dream (National Youth Theatre); Europe, You Got Older (LAMDA); Beginners (Unicorn Theatre); Elephant (Birmingham Rep); Outside and Out of Water (Orange Tree Theatre); The Tide Whisperer (National Theatre Wales); Highway One (August 012 & Wales Millennium Centre); Frogman (Curious Directive, Traverse Theatre); Paul Bunyan, The Day After, Trial by Jury (English National Opera). Other designs include:No Place for a Woman (Theatre 503); Yuri (Chapter, Cardiff)

Milla trained at the Royal Welsh College of Music and Drama, graduating with a first-class BA hons degree in Theatre Design.