Jordyn, 21, looks beautiful on the cover in yellow shorts and a matching jacket.
"SEPTEMBER BABY ? thank you @cosmopolitanuk for giving me the opportunity to be your cover girl for my favorite month of the year. Thank you UK for always showing me so much love over the years. I can’t wait to share the rest of this shoot with you this week," Jordyn wrote on Instagram to announce the big news.
Kylie Jenner's former best friend went on to promote her latest projects.
She continued, "The young tomboy little girl in me is shaking. Wearing my LA BABY lashes with @eylureofficial and a FIRST LOOK at my hair collab with @easilockshair ? wearing the pony ... only a few more weeks until you can get yours!"
"Kylie thinks Jordyn is just pathetic for trying to turn this all around. She has made a fortune off of this scandal and it makes Kylie so upset because she is still making money off of Khloe’s heartache!” a source told RadarOnline.com.