Kim Kardashian West is expecting a baby boy.

The 34-year-old reality TV star - who already has two-year-old daughter North with her husband Kanye West - took to Twitter on Sunday (21.06.15) to reveal they are preparing to welcome a son.

Addressing her message to Kanye, she wrote: ''You're such a good daddy to North & you will be the best daddy to our new son too!''

Meanwhile, Kim had earlier posted a glowing tribute to her husband to mark Father's Day.

She tweeted: ''I'm so lucky to be married to a man who is so in love with his daughter, your bond is so irreplaceable! Thank you for being such a good dad! We love and appreciate you so much! We're so blessed to have you!''

Kim's tweets come shortly after she rubbished speculation surrounding the sex of the baby, insisting that she and her 38-year-old husband had refused to reveal details regarding the birth.

Speaking earlier this month, she said: ''We actually haven't told anyone the sex. So I heard that we're having a boy. I heard that we're having twins. I heard that I'm not even carrying my own baby. I've heard so many things and most of that information is not true.''