Kendall Jenner's modeling career is continuing to take off -- the 15-year-old's latest venture is for an Australian swimsuit designer!

Big sister Kim Kardashian posted the above pic of Kendall, 15, to her blog, saying:

    "Kendall is the new face of ... Leah Madden’s ... Summer 2012 campaign ‘Pirouette!!’ How stunning does she look!?!? I couldn’t be more proud!!!!"

Kendall does look great, though we're not sure how we feel about her hair ... it reminds us of '80s band Flock of Seagulls.

Of course, not to be outdone, cover girl Kim send out a pic of herself via Twitter Monday night. See the pic after the jump!