Kylie Jenner, 12, Makes Modeling Debut (PHOTO)

07/31/2010 08:51 am ET | Updated May 25, 2011

The youngest Kardashian sister, 12-year-old Kylie Jenner, has made her modeling debut.

The younger of two daughters by Kris Kardashian and Bruce Jenner, her older sister Kendall, 14, has been modeling bikinis and swimwear since she started in the industry.

Now Kylie is modeling for Sears.

Friday big sister Khloe tweeted,

KYLIE'S MODELING DEBUT!!!!! OMG I'm such a proud mama! My baby sisters are so grown up!

And the link is to this photo: