robhospital460.jpgTwitter

Just a few days after celebrating his 24th birthday at Jet Nightclub at the Mirage Hotel and Casino in Las Vegas, Rob Kardashian underwent emergency surgery here in Los Angeles to remove his appendix.

After complaining of stomach pains, Kim's younger brother was taken to an LA hospital yesterday for the procedure.

Kim, 30, tweeted, "'Robbie is sick! He will be ok though!" In response, Rob tweeted the above photo and showed a sense of humor by saying, "This is what happens if you don't eat your Wheaties..."

We wish him a speedy recovery! Rob will be a big part of sister Khloe and Lamar's new reality show. Find out when it premieres ... after the jump.