My absolute favorite costume designers and my favorite movies that they've done! If you haven't seen any of the following, watch them!!!
1. Sandy Powell
Interview with a Vampire
The Young Victoria
The Other Boleyn Girl
Shakespeare in Love
Sandy Powell OBE (born 7 April 1960) is a British costume designer who has been nominated ten times for the Academy Award . She won the Oscar in 1999 for the film Shakespeare in Love, in 2005 for The Aviator, and in 2010 for The Young Victoria. She has received nine BAFTA nominations, winning in 1999 for Velvet Goldmine and 2010 for The Young Victoria. She won numerous other awards in costume design for the latter film.
She left Central St Martins School of Art, London before completing her degree, due to offers of work from, amongst others, Derek Jarman. Whilst at Central, the renowned theatre designer Pamela Howard, then first year tutor, told Powell that there was nothing that she could teach her.
She was appointed Officer of the Order of the British Empire (OBE) in the 2011 New Year Honours for services to the film industry.
2. Milena Canonero
Out Of Africa
A Clockwork Orange
Born in Turin, Italy, Canonero studied art, design history and costume design in Genoa. She then moved to England, where she began working in small theatre and film productions. While designing for commercials in London, she met many film directors.
Her first major film work as a costume designer was in Stanley Kubrick's A Clockwork Orange (1971). She worked with Kubrick again in Barry Lyndon (1975), for which she won her first Oscar, together with Ulla-Britt Söderlund. Her second win was for Chariots of Fire (1981), directed by Hugh Hudson.
Canonero has also designed the costumes for several stagings directed by Otto Schenk, such as Il trittico (Puccini, Vienna State Opera 1979), As You Like It (Shakespeare, Salzburg Festival 1980), Die Fledermaus (Strauss, Vienna State Opera 1980), Andrea Chénier (Giordano, Vienna State Opera 1981), and Arabella (Strauss, Metropolitan Opera 1983). For director Luc Bondy she created the costumes for new productions of Puccini's Tosca (Metropolitan Opera, 2009), and of Euripides' Helena (Burgtheater, Vienna, 2010).
In 1986, Canonero became the costume designer for the television series Miami Vice.
3. Michael O'Connor
In 1993, he began work as a wardrobe supervisor on such films as The House of the Spirits and Emma, before becoming an assistant costume designer. In this role, he worked on various films, including Oscar and Lucinda, Quills, Proof of Life and was also associate costume designer on the film version of Harry Potter and the Chamber of Secrets.
After working as costume designer on several minor British films, he came to prominence with his work on Tom Brown's Schooldays, a TV movie for ITV. He then worked on his most high profile film up until then, the film version of Giles Foden's bestselling novel, The Last King of Scotland. He then worked on Brick Lane as well as Miss Pettigrew Lives for a Day.
He came to the attention of the film industry in 2009, when he received the Academy Award for Best Costume Design, the BAFTA Award for Best Costume Design as well as the Satellite Award for Best Costume Design for The Duchess.
4. Alexandra Byrne
Elizabeth/ Elizabeth the Golden Age
The Phantom of the Opera
She has designed the costumes for twelve films in her career, earning Academy Award nominations for four of them—Elizabeth , the 2007 sequel Elizabeth: The Golden Age , Hamlet  and Finding Neverland ; and considerable acclaim[which?] for three others—Persuasion, Captain Corelli's Mandolin, and The Phantom of the Opera. She won the Academy Award for Elizabeth: The Golden Age. 
She is married to actor Simon Shepherd with four children.