The reality TV star announced the pregnancy during the latest episode of the series, as she returned to make an appearance at Binky Felstead's baby shower.
Taking to Instagram to share a sonogram at the time, the mum-to-be wrote: 'Super happy and excited!'
The 32-year old new mum took to Instagram to announce the safe arrival of baby Charlie in a sweet post, sharing a glimpse of the youngster with her 96.4k followers.
The split pic shows the tiny leg of Charlie, all wrapped up with tiny socks on and still with his baby tag on his ankle.
The tag showed he arrived on 14th November, and a beaming and fresh-faced Cheska with an oversized shawl can also be seen against an autumnal backdrop.
The caption read: 'BABY HULL HAS ARRIVED Welcome to the world my beautiful little soldier - Charlie Henry Stephen Hull! Born on his due date, 14th November 2017 and weighing 8 lbs 6oz... so happy and complete! Love my little darling xxx'
After the mum posted the announcement on social media, the congratulations came rolling in. One fan posted: 'Congratulations Cheska what a gorgeous name too all the best for your new addition to your family.'
While another commented on the new mum's appearance: 'Congratulations. You look amazing xx'
A third fan joked that the pregnancy seemed to take a while: 'Yay!!! This pregnancy has taken forever.'
Cheska also revealed in September that she knew the gender of her baby bump, with a sweet baby shower snap, complete with blue balloons and blue heart emojis.
Cheska - full name Francesca Hull - is one of the original cast members of C4's Made In Chelsea.
She left the reality TV show in 2014 after three years of filming, but made a special return for Binky's baby shower.
The return was made even more emotional because of her baby announcement, but also because it marked Binky's final episode ever of the series.