Kendall Jenner is ''the most beautiful'' woman in the world, according to Olivier Rousteing.

The 31-year-old fashion designer, who has created showstopping masterpieces for Kendall and her siblings including Kim Kardashian West and Kylie Jenner, has credited the 21-year-old model as the best looking female.

Speaking in a video on 10magazine.com, which sees Olivier interview the 'Keeping Up With the Kardashians' star for the publication, the creative mastermind said: ''I am with one of the most beautiful girls in the world.''

And Olivier - who is the creative director of the luxury designer brand Balmain - believes something must be ''wrong'' with anyone who doesn't know who the catwalk icon is.

He continued: ''And maybe if you don't know her name, I think it's wrong if you don't.''

The television personality later revealed she has a ''tonnes'' of nicknames, although she only has one favourite name, which is Kenny, because it leaves her feeling ''cute''.

Speaking about her pet names, she explained: ''Kenya, Kendo, Kenny. I have so many, I have tonnes.

''I like Kenny, it makes me feel cute.''

Meanwhile, Olivier - who joined forces with the luxury designer brand in 2009 - has admitted he ''wasn't afraid'' of working in the fashion industry when he first launched his career, and didn't feel under pressure when he created his debut capsule because he had no expectations.

Speaking previously about his career, the creative director of the fashion house who was only 25 years old when he took over from Christophe Decarnin to helm the brand, said: ''I wasn't afraid [of the job], because I was so young. I was like a kid who wants to touch fire and doesn't understand that it will burn.

''So I think my first collection was the least stressful, because I didn't know what to expect. Now, I have my own crowd. I always say Christophe was rock 'n' roll, and I'm more hip-hop. It's a different generation.''