Grace Kathleen Hartzel[4][5][6] (born October 11, 1995) is an American fashion model from Zionsville, Indiana.

She was discovered at the age of 15 while dining at a St. Louis Cheesecake Factory with her family.

[9][10] Slimane's spring 2014 show was entirely made in Hartzel's image, when she was an unknown.

[12] Grace Hartzel[13] debuted as a runway model in 2012, since then she has walked for brands such as Vera Wang, Prada, Yves Saint Laurent, Dior, Chanel, Fendi, Salvatore Ferragamo, Moschino, Bottega Venetta, Marc Jacobs, Alberta Ferretti, Armani, Gucci, Givenchy, Lacoste, Lanvin, Loewe, Carolina Herrera, Dolce & Gabbana, Louis Vuitton, Alexander Mc Queen, Dsquared2, Valentino, OscardelaRenta, Paul Smith, Blumarine, Burberry, Celine, Versace, Tom Ford, Elie Saab, Max Mara, Michael Kors, Miu miu, Ralph Lauren, Roberto Cavalli and Tommy Hilfiger.

[14][15] Hartzel has appeared in different advertising campaigns for brands and fashion houses such as: Chanel watches,[16] DKNY fragrance,[17] Carolina Herrera,[18][19] Saint Laurent,[20][21] Etro,[22][23] Valentino,[24][25] Chloe,[26][27] Tom Ford,[28][29] Salvatore Ferragamo,[30][31] Dior,[32][33] Sonia Rykiel,[34] Tods,[35] Calvin Klein,[36][37] Dsquared2,[38] Coach,[39] YSL beauty,[40][41] and ZARA.