US reality television star Kim Kardashian is expecting a baby by her boyfriend, rapper Kanye West, the website E! News reported.

No details were given, but the site said West announced the news during his Atlantic City show on Sunday night.

West and Kardashian announced in March that they were dating.

Kardashian married professional basketball player Kris Humphries in August 2011, but they split shortly afterwards, although their divorce has not been finalized.