Which designer is known for popularizing the tuxedo jacket for women?

Yves Saint Laurent is renowned for his groundbreaking contribution to women's fashion, particularly for popularizing the tuxedo jacket for women with his iconic "Le Smoking" design introduced in 1966. This bold move not only challenged traditional gender norms in fashion but also empowered women by incorporating elements of menswear into their wardrobes, allowing them to express themselves with a level of sophistication and androgyny that was largely uncharted at the time. The tuxedo jacket became a symbol of liberation and elegance, showcasing the versatility of women's fashion and paving the way for future designers to explore similar concepts.

While the other designers mentioned have made significant impacts in various areas of fashion, none are specifically credited with the pivotal role of bringing the tuxedo jacket into women's fashion in the same transformative way as Yves Saint Laurent did. Mary Quant is celebrated for her connection to the Mod fashion movement and the mini skirt, Christian Dior is known for the "New Look," which emphasized femininity with the hourglass silhouette, and Alexander McQueen is recognized for his avant-garde and theatrical designs, but they did not focus on the tuxedo jacket for women in the way that Laurent did.