[1][2][3][4] She has received 15 nominations for the Academy Award for Best Costume Design and has won three times for Shakespeare in Love (1998), The Aviator (2004), and The Young Victoria (2009).

She has also been nominated for the BAFTA Award for Best Costume Design a record 16 times and had three wins for Velvet Goldmine (1998), The Young Victoria, and The Favourite (2018).

[16] Following her win at the 71st Academy Awards, Powell began her collaboration with director Martin Scorsese, starting with his 2002 epic period drama film Gangs of New York, for which she earned her 5th Oscar nomination.

She worked on Scorsese gain this time for a film set in modern-day creating current day clothing for the Boston crime drama The Departed (2006) starring Leonardo DiCaprio, Matt Damon, and Jack Nicholson.

The following year she worked on Scorsese's psychological thriller Shutter Island starring Leonardo DiCaprio and Julie Taymor's The Tempest with Helen Mirren.

In 2011 she was nominated for the Academy Award for Best Costume Design her work on Scorsese's children's action adventure film Hugo losing to Mark Bridges for The Artist (2011).

In 2016, Powell received her second dual nominations at the 88th Academy Awards, having been recognized for her works in Kenneth Branagh's Disney live-action adaptation of Cinderella and for Todd Haynes' romantic drama Carol (2015).

[19] She reunited with Haynes for the black and white film Wonderstruck (2017) starring Julianne Moore and Michelle Williams, based on the 2011 novel of the same name by Brian Selznick.

[20] That same year, she worked on the John Cameron Mitchell's wacky science fiction romantic comedy How to Talk to Girls at Parties (2017).

[21] In 2020, Powell received her 15th Oscar nomination in her seventh collaboration with Martin Scorsese in his epic crime film The Irishman starring Robert De Niro, Al Pacino, and Joe Pesci.