Karlie Kloss had to have boots custom made to fit her long legs.

The 6' 1'' supermodel struggled to fit into a pair of Tamara Mellon's iconic trouser boots from her pre-fall 2015 collection and was thrilled when the Brit-born designer crafted a pair specially for her statuesque physique.

She said on the red carpet at the PEOPLE Magazine Awards last night (18.12.14): ''I have these amazing leather boots and pants in one. The Tamara Mellon ones. They're amazing. She made them custom for my long legs.''

Karlie, 22, looked breathtaking in a ''gorgeous'' Zac Posen bustier top and black lace Marchesa skirt as she arrived at the awards held at the Beverly Hilton Hotel in California, but opted to change her outfit twice throughout the night, first into a crop top and pencil skirt, also from Tamara's pre-fall collection, and finally into a chic long-sleeved black dress.

Karlie's hairstylist Giannandrea was also on hand to share the inspiration behind her stunning up-do.

He told PEOPLE: ''The hair inspiration tonight is undone goddess. A modern, texturized, effortless updo.''