Kim Kardashian pregnant: Kanye West confirms they are expecting their first child

Kanye announced news onstage during Atlantic City show
Reality star's spokesman confirmed news to MailOnline
Sister Kourtney tweeted: 'Another angel to add to our family'

PUBLISHED: 00:45 EST, 31 December 2012 | UPDATED: 04:37 EST, 31 December 2012

Kim Kardashian is expecting her first child with her boyfriend Kanye West the reality star's representative confirmed the happy news to MailOnline.

The pregnancy was revealed by Kanye onstage during a concert in Atlantic City on Sunday night as Kim watched.

The rapper said 'stop the music', then announced 'make noise for my baby mama right here,' with a wide smile. Kanye's announcement prompted a flurry of excited tweets from the audience.

WATCH ANNOUNCEMENT BELOW...

Expecting: Kim Kardashian and Kanye West attend a basketball game in Los Angeles on Christmas Day

The two have been dating for eight months. They have previously denied pregnancy rumours.

Kim is thought to be around the 12-week mark.

Kim, 32, and Kanye, 35, were last seen together on Christmas Day when they attended a basketball game to watch Kim's brother-in-law Lamar Odom play with his new team The Clippers.

Kanye was seen carefully attending to his girlfriend and holding her hand as they sat side by side in the front row. They left at half time, with Kim later tweeting that she felt 'unwell'.

Beside themselves with excitement: The thrill of impending parenthood was subtly written all over their faces

'In bed with the flu all day. Praying this goes away fast!' the Keeping Up With The Kardashians star wrote.

Kim is still married to her estranged second husband Kris Humphries. The pair's divorce has been prolonged as the basketball star has insisted on a court case, claiming the marriage should be annulled as it was 'fraud'.

After the news of Kim's pregnancy broke late on Sunday her excited family took to Twitter.

Sister Kourtney wrote: 'Been wanting to shout from the rooftops with joy and now I can! Another angel to welcome to our family. Overwhelmed with excitement!'

Shout out to his 'baby mama': Kanye made the announcement at this concert

Full of festive cheer: Kanye could not stop grinning after he made his spectacular announcement

And little sister Kendall added: 'Whos excited about the KIMYE babbyyy?! :D weeee'.

Khloe wrote: 'KIMYE!!!!! Keeping secrets is hard with so many family members! 'Especially when you are so freaking excited!!!!! LOVE is everything!!!!

Khloe's husband Lamar tweeted: 'I'm excited for Kanye and my sister! There's nothing like bringing life into this world!

Exciting! Kim's large family were quick to offer their congratulations to the happy couple

'Let's keep Gods blessings coming!'

And Grandma-to-be Kris Jenner added: 'I'm a happy girl !!!!!!!!! Wowza!'

Kanye spent the Christmas period with Kim's family, who have welcomed him with open arms.

Kim has also become close to Kanye's family after being he took her to visit them in Oklahoma City while visiting his mother Donda West's grave last month.

Since Kim and Kanye began dating in April they have rarely been apart.

Despite the shortness of their relationship, the two have been friends for years.

It has even been speculated that the rapper had been in love with Kim back in 2009, when he appeared to refer to her in his track Knock You Down.

Parents to be: The couple have been the picture of happiness since they started dating earlier this year

Always together: Kim and Kanye walk around Los Angeles on Christmas Eve

At the time the song was penned, Kim was in a relationship with NFL star Reggie Bush, whom she went on to date on and off for three years.

The song includes the lines: 'You was always the cheerleader of my dreams... To seem to only date the head of football teams... And I was the class clown that always kept you laughing... We were never meant to be, baby we just happened.'

He then goes on to rap: 'You should leave your boyfriend now.'

And in December 2010, Kanye was on hand when Kim filmed her music video Jam (Turn It Up).

In scenes later broadcast on her reality show Kris Jenner was seen jokingly criticising Kanye for eyeing up Kim, telling him: 'Don't be looking at her a**'.

Not one to miss a beat, quick-witted Kanye replied: 'I've never seen it actually.'