VIDEO : Caitlyn Jenner, Rob Kardashian and More Wish Khloe Kardashian Happy Birthday

As the Keeping Up With the Kardashians star turns 31, the outspoken reality star and fashion designer is receiving plenty of love from her family on social media. Caitlyn Jenner took the short but oh-so-sweet route with her afternoon message. "Happy Birthday, beautiful!" she wrote on Instagram while sharing a selfie. In true Kardashian style, this wouldn't be a birthday without many of the sisters also sharing their well wishes with fans online. Kim Kardashian praised Khloé's "beautiful soul" while Kourtney Kardashian described her sister as "the Thelma to my Louise.