Violinist Lettice Rowbotham, who was dubbed Britain's Got Talent's 'poshest ever contestant', has given birth.

She announced the news on Instagram, writing: "We’re all so in love️ & we cherish her so much, my beautiful baby girl.

"Our new adventure in life, parenting has just begun & I am the happiest & luckiest girl in the world to be her mummy & start this adventure with her daddy, who has looked after me so so so well!

"We’re all doing so great and now I’m feeling extra inspired with my music. Have already written two songs since she was born (must be mummy super powers!) and I can’t wait to start sharing more music with you all on here again soon.

Lettice was on the show in 2014

"Thanks so much to everyone for being so supportive during my pregnancy & sending in so many wonderful messages. I feel so loved & supported by you all. Thank you. Lots of love️ from my brand new family"

Her fans rushed to offer their best wishes.

One wrote: "Congratulations to you all Lettice Well done & enjoy every moment with your Beautiful little girl!"

Lettice and her partner have welcomed their first child

Another posted: "Congratulations to you both, how wonderful to have a daughter. Wishing you much happiness and lots of fun"

While a third begged to know the name, writing: "Congratulations! What is her name? I am wishing her iron health and a great childhood!"

Lettice kept her fans up to date with her pregnancy throughout.

She announced the birth on Instagram

She first shared the news on January 1, with a beautiful picture of herself and her partner posing up in the woods.

She wrote: "We’re having a 2020 baby!"

She was 21 weeks along at the time.

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On April 25, she showed off her blossoming bump with another woodsy picture.

She captioned the snap: "Just a few weeks until our baby is born!

"P.S; hypnobirthing has been amazing! It’s really helped me become more positive & have a happier mindset about the birth despite all the unusual things going on in the world right now! Feeling so lucky to have the NHS & all my family & friends & especially my boyfriend supporting me."