Reality TV star Khloé Kardashian has welcomed her first child, a baby girl.

US celebrity website TMZ first reported that Kardashian gave birth on Thursday morning at a hospital outside Cleveland in the US state of Ohio.

It is reported that the baby's father, basketball player Tristan Thompson; Kardashian's mother, Kris Jenner; and her sisters, Kim and Kourtney; were all present. It is also reported that Khloé Kardashian's best friend, former Celebrity Big Brother star Malika Haqq, shared in the family's joy. 

Khloé Kardashian and Tristan Thompson celebrating Thompson's birthday in Los Angeles in March

Grandmother Jenner later shared her joy on Instagram by re-posting a W magazine video of her daughter Kendall saying "baby" on a loop. 

Jenner's caption read: "Blessed!!!"

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Keeping Up with the Kardashians star Khloé revealed that she was expecting a baby girl in January.

She said the child would be "forever best friends" with her sisters' newborns "Chicago and Stormi".

Taking to Twitter, Khloé Kardashian wrote at the time: "I am now so excited my daughter will have forever best friends with Chicago and Stormi!! God is great!!! Thank you Lord for our princess."

Chicago is her sister Kim Kardashian West's daughter, and Stormi is her half-sister Kylie Jenner's daughter.