Kim Kardashian says she held Khloe's leg while she gave birth to her "Gorgeous" baby

Kim has disclosed she was on ground to help her sister Khloe Kardashian deliver her first child with Tristan Thompson on Thursday.

Taking to Twitter on Friday to give fans update about her birth of sister's baby daughter, the mother of three gushed about the baby and revealed she returned a favor by holding her leg while she pushed.

"@khloekardashian I'm so happy for you! Your baby girl is so beautiful! You are so strong, you made that look so easy! I can't wait for our baby girls to grow up as best friends the way we are!" Kim wrote, adding, "I'm so happy I was able to return the favor of holding your leg while you pushed LOL."

"You guys she's so gorgeous!!!!!" Kim tweeted.

According to Kim,  Khloe held her leg when she gave birth to her eldest children, daughter North West, now 4, and son Saint West, 2.