This is the moment a foul-mouthed grandmother who thinks 'girls are bitches' spoils a baby's gender reveal - by announcing with disapproval that it was a 'f**king girl'.

Carrie-Anne Sanca used a balloon filled with pink confetti to give her mum the 'same moment' she found out she was having a girl for a gender reveal on October 1 after seeing the idea online.

But the 33-year-old was left 'shocked' when 76-year-old mum Margaret expressed her less-than-subtle disappointment as she found out her daughter was having a girl.

Surprise! Carrie-Anne Sanca used a balloon filled with pink confetti to give her mum Margaret (pictured) the 'same moment' she found out she was having a girl for a gender reveal

Hilarious footage shows grandmother Margaret burst the balloon with a pin and swear as she sees the pink confetti, before calling the baby a 'split ar**' - offensive slang for a girl.

Her reaction is reminiscent of Catherine Tate's depiction of Joannie 'Nan' Taylor, a grandmother, whose character is infamous for her foul-mouthed tirades.

Margaret, who already boasts nine children, 23 grandchildren and 19 great-grandchildren, was unaware that the video had gone viral until her daughter told her she was an online hit.

Carrie-Anne, from Bridgend, Wales, said: 'She always says "boys are lovely, girls are b*tches". I think to be honest it's just the way she is.

Margaret (right), who has nine children, 23 grandchildren and 19 great-grandchildren, was unaware that the video had gone viral until her daughter (left) told her she was an online hit

'When she swore in the video I just said "mam". I don't think she realised she was swearing - it just came out naturally. That's just her.

'I didn't expect a reaction like that to be honest. I wanted to share with her what I was having and the excitement of knowing.

'I wanted to give her a surprise and share it with her. I wanted to re-create the same moment I had when I learned I was having a girl and give her the same surprise and excitement.

'I really thought she would love it but it wasn't the case because she wanted a boy.

'I wasn't disappointed because whatever happens I'm having a girl and there's no turning back now.

'She really wanted a boy you see. I think she was just a bit disappointed at the time. But after that she just got over it and said "well, as long as it's lovely it doesn't matter".

'I don't think she minds as long as it's healthy. She said "Oh, are we having a little Maggie May from down the way?"'

Carrie-Anne (left), from Bridgend, Wales, said: 'She always says "boys are lovely, girls are b*tches". I think to be honest it's just the way she is.' Pictured right:

Carrie-Anne got the idea of setting up a 'gender reveal' by looking on social media.

She said: 'I wanted to use the balloon idea because I'd seen it on Pinterest and I just wanted something different so my mum could find out I was having a little girl.

'So I bought the balloon after I found out the sex of the baby and did that.'

The video was shared over 16,000 times on social media and hit nearly two million views in just two days.

In the video, Carrie-Anne's partner Paul Jones holds up the balloon and Carrie-Anne says 'boy or girl?' in anticipation before Margaret takes to it with a pin.

Carrie-Anne said: 'One minute we post it, the next minute we had all these people liking it and sharing it and it reached millions of views.

'People were adding her as a friend. When I told my mum she just couldn't believe it. She was just so shocked.

'I said, it's on social media so you're on the news. You're on the news mam, have a look and she just kept saying 'you're lying, you're lying.'

'I think she just can't understand it.'