Philip Treacy le Bon, Kate Moss, Christy Turlington and Stella Tennant modelling in return for keeping Treacy's hats, which were all black. In 1994, he opened up his boutique at 69 Elizabeth Street, in Belgravia, London, right beside Isabella Blow's resicence at number 67. Treacy has designed hats for Alexander McQueen (another discovery of Isabella Blow), including his 1999 "white collection" for Givenchy Haute Couture in Paris, for Karl Lagerfeld at Chanel, and for Valentino, Ralph Lauren, Donna Karan, Versace and Rifat Özbek. In January 2000, he became the first milliner for 80 years to be invited to exhibit at the Paris
Keith Treacy player in the first team squad under managers Eddie Howe and Sean Dyche. In effort to boost chance to make to the Ireland Squad for UEFA Euro 2012, Treacy joined Sheffield Wednesday on loan until the end of the season. Treacy made his Sheffield Wednesday debut two days later, coming on as a substitute for Jermaine Johnson in the 78th minute, in a 1-0 win over Leyton Orient. After making appearance, mostly from coming on the bench, Treacy scored his first Sheffield Wednesday goal, coming from a direct free kick and provided a winning goal, in a 2-1 win over