Kylie Jenner's baby name has been 'revealed' by experts hours after the star welcomed her first child.

The 20-year-old media personality announced that her baby girl had arrived in an emotional video that documented her entire pregnancy, from the first scan to her labour.

But she didn't reveal the name of her little one at first - so fans were left guessing at what her choice might be.

Now Ladbrokes has calculated the most likely options - and the bookies' favourite is... Krystal.

Kylie has given birth after months of speculation (Image: Instagram)
She showed off her bump in an intimate video documenting her pregnancy (Image: Instagram)

Odds are being offered at 10/1 for little Krystal, followed by Rain at 11/1 and Kirsten, Rose and Malibu - where Kylie spends much of her time - at 12/1.

Slightly less likely but still valid options are Kara, Kacey, Cala and Kaitlin - at 14/1.

Baby Love is also up there at 14/1.

Kylie may choose to name her little one after her natural surroundings, with Ocean, Coral and even February being offered up by the betting company.

Pregnant Kylie cradles Kim's daughter Chicago in previously unseen footage (Image: Kylie Jenner/Youtube)
She's seen cooing over her newest niece days before giving birth to her own daughter (Image: Kylie Jenner/Youtube)

She could go down the family route and honour one of her sisters - Kim, Khloe, Kourtney or Kendall, or mum Kris - but seems least likely to pick a traditional name like Debbie, Janet, Sharon, Margaret or Sally.

Jessica Bridge of Ladbrokes told Mirror Online: "Hopefully Kylie won't make us wait another nine months to find out the name, but given she's been quite traditional - as Kardashians go - and has kept her pregnancy private to just her family, we reckon she could continue the theme of all names beginning with K."

Kylie may have dropped a number of hints about her chosen baby name already, as fans have been picking up what they think are clues from the documentary-style video that Kylie released.

Kylie shows off her baby girl's extensive pink wardrobe (Image: YouTube)
Her friend gifts her with a tiny pair of Nike sneakers (Image: YouTube)
Kylie cuddles up to mum Kris as they watch her scan (Image: YouTube)

In it, the camera focuses on her touching her silver necklace emblazoned with butterflies - and fans reckon Butterfly could be the name she and Travis have picked.

To back up their theory, the proud new mum also showed the wall of the baby's nursery, which featured colourful Butterfly motifs.

And she and Travis last year got matching butterfly tattoos on their ankles to cement their love.

Kylie wanted to keep her pregnancy out of the public eye (Image: YouTube)
She and Travis only told their family and closest friends (Image: YouTube)
Kylie still kept a record of her growing shape (Image: YouTube)

But Kylie has revealed in the past that she's secretly terrified of the flying insects, after her friends tricked her into visiting a butterfly farm on an episode of her reality show Life Of Kylie.

"Butterflies are just a part of the secrets of Kylie," she told the camera at the time.

"It's kind of just ironic because I'm terrified, terrified of butterflies. This is how I think of them: cut the wings off and if you just look at their bodies, it's not that pretty. It's literally a bug."

Travis and Kylie got matching butterfly tattoos in 2017 (Image: Snapchat)
Is that a clue to their daughter's name? (Image: Snapchat)
Kylie fuelled the name speculation with a picture of her butterfly bracelet before giving birth (Image: Kylie Jenner/Instagram)

Butterfly wouldn't be the most outlandish Kardashian name in existance.

Sister Kim named her children North, Saint and Chicago West, while Kourtney bestowed hers with the monikers Mason, Penelope and Reign Disick.

And brother Rob Kardashian named his daughter Dream when she was born to then-girlfriend Blac Chyna in late 2016.

Here's what all the Kardashian baby names mean .