Jessica Alba reveals she's welcomed third baby with husband Cash Warren

Jessica Alba has revealed that she's welcomed her third child with husband Cash Warren.

The Hollywood star took to Instagram to announce the happy news that she's given birth to her third baby, with an adorable picture of the little one.

Writing in the caption, the now mum-of-three revealed the baby name they picked and that the little boy was born on the last day of the year.

She wrote: 'Hayes Alba Warren 12/31/17 Best gift to ring in the New Year!! Cash and I feel so blessed. Haven and Honor are already obsessed with their new baby bro. 👶🏽💙 #familyof5'

Fans of the Fantastic Four star were quick to congratulate on her baby news, writing lovely messages in the comments section.

One said: 'Congratulation and best wishes! hes so cute 😍! all the best from my family to yours.'

A second commented: 'My congratulations!!! He is the best gift for you!!!! Happy new year guys! Wish you all the best))) 😁 ❤❤❤😍😘'

A third wrote: 'Congratulations Jessica! He is beautiful and perfect ❤️💟😘'

Hayes is Jessica's third child, and her first baby boy, after she welcomed Honor in 2008 and Haven in 2011.

The business women announced she was going to become a mum for the third time in July, with the help of her two daughters.

Captioning the short announcement clip, Jessica wrote at the time: '@cash_warren and I are officially going to be outnumbered #babyonboard #herewegoagain 👶🏼🤰🏽#blessed🙏'

In October, Jessica gave fans another update when she revealed she was having a baby boy. Once again enlisting the help of her two girls, the trio were filmed opening a 'gender reveal box' and were showered with blue confetti and balloons.

The actress later revealed the reason why she wanted to have a baby boy, saying that her daughters were always more excited about seeing their father, which she's hoping will happen for her with their little boy.

'For me … the girls love their dad. I wanted someone to love me more', the mum said. 'When he comes home, they're like, "Daddy!" It's like a party.

'When I come home, they're like, "Oh, hey Mom". I'm like, "I do everything for you! I cook, I do all the things!"', she said on The Rachael Ray Show.