'Mother and son are doing well!' Kim Kardashian and Kanye West announce the arrival of their baby boy!!!

Big news: The couple announced the birth with a message on Kim's website, kimkardashianwest.com

On Friday night the 35-year-old had posed for a selfie in her bathroom, and captioned it: 'Ready whenever you are lol.'

Kim's baby was due on Christmas Day, which would have made her around 37 weeks pregnant - which is considered full term by medical professionals.

Kim Kardashian has welcomed a baby boy. In a statement on her website kimkardashianwest.com a representative for the couple wrote: 'Kim Kardashian West and her husband, Kanye West, welcomed the arrival of their son this morning.

'Mother and son are doing well.'

Along with the statement was a picture of the couple holding hands. Such was the flurry of interest that the website crashed under the weight of traffic.

Mom and pops: Kim Kardashian and Kanye West, seen on October 20, are the proud parents of a newborn son; they announced the happy news online.

Happy news: The new parents shared a sweet picture showing them holding hands. The Keeping Up With The Kardashians star had made no secret of the fact that she was ready for the pregnancy to be over.

Yesterday she penned a blog post on her subscription based website entitled Body Bounceback.

'A few weeks to go and 60 pounds up!' she wrote in the post.

'I look at other celebrities and Instagram girls who are literally so skinny right after giving birth. How is that possible?!?!'

Last bare-stomach selfie: On Friday night the 35-year-old posed for a selfie in her bathroom, and captioned it: 'Ready whenever you are lol'

Kim jokingly added: 'F***, I hope people don't expect that from me, lol!'

The mother of two-year-old North West also told fans she plans to take her time when it comes to losing the pregnancy weight, and will be 'focused' and enjoy the 'challenge'.

Earlier in the day, Kim shared a selfie with her 53.5 million followers on Instagram, simply captioning it: 'Waiting...'. As it turned out, she didn't have to wait long.

New mother: Kim welcomed her son early on Saturday morning. During her first pregnancy, the reality TV queen had to give birth five weeks earlier than her due date after her blood pressure spiked.

Kim's pregnancy had been classified as high-risk, due to her complicated medical history.

Indeed there was some speculation that she may deliver her son as early as Thanksgiving.

She also recently had her baby turned from his breech position in the womb in a painful but ultimately successful procedure.

Proud parents: The couple, seen in September, had been due to welcome their son at Christmas

Kim's journey to become a mother-of-two was certainly not a simple one.

As viewers of her reality show Keeping Up With The Kardashians will know, she struggled to conceive second time round.

Determined to carry her own child - and not use a surrogate - Kim chronicled her efforts to fall pregnant.

'We are trying. We try every single day. You can't try harder than we try,' she told E! adding: 'It's getting exhausting. He always says, "Trying for baby No. 2 isn't as fun as trying to baby No. 1."'

Kim continued: 'But we're literally trying everything that we can to make it happen, so I'm to the point now where it's not as stressful to me. And maybe that's when they say it happens.'

Baby shower: Kim celebrated her new arrival with a Troop Beverly Hills themed party in October

Her attempts proving unsuccessful the reality star approached her doctor, who was seen on camera 'cleaning out' her uterus.

After removing a small portion of what he suspected to be old placenta from her first pregnancy, Kim was given a clean bill of health.

And it worked. Kim announced her pregnancy back in May, via her reality show.

'I just got the blood test back, and I am pregnant!' Kim—who was beaming ear-to-ear—exclaimed to her stunned sister Khloe while on a trip to Armenia.

Kim gave birth to her first child North - Nori, as her family calls her - on June 15, 2013, in Los Angeles.