Kris Jenner is impressed by her daughters' ''inner strength'' and ''thick skin''.

The 62-year-old momager - who has daughters Kourtney and Khloe Kardashian and Kim Kardashian West, and son Rob Kardashian with late ex-husband Robert Kardashian, and Kendall and Kylie Jenner with former spouse Caitlyn Jenner - is proud of her brood's strong work ethic and sense of creativity.

She told People magazine: ''There's a certain inner strength that the girls possess.

''It's very important to have their level of thick skin. They're very smart girls, they're very intelligent and they're very creative.

''And they love getting up every day and working. One day it's the Met Ball, one day it's shooting the cover of Vogue or a campaign.

''There are so many things the girls have accomplished and it takes a lot of hard work and the best kind of work ethic around.''

The 'Keeping Up With the Kardashians' star is now a grandmother of nine and gives thanks every day for her family.

She said: ''I think God every day for the blessings. Just to be around watching my babies have babies, it doesn't get any better than this.''

The showbiz matriarch is seeking a new personal assistant through professional networking platform Bumble Bizz but admitted she finds it hard to delegate and hand over responsibility to anyone else.

She said: ''My grandmother used to say, 'If you want something to be done right, do it yourself.' And I was brought up on that!

''But at some point you really have to let it go and say 'I cannot babysit everybody. I cannot continue day after day telling someone how to do their job.'

''You just want somebody who can learn on the job every day.''