Katherine Ryan has shared the heart-stopping moment she locked herself home while her one-month-old daughter, Fenna Grace was still inside.

The comedian, 39, took to her Instagram story on Friday to share home surveillance footage of when she realised she couldn't get back into her home.

In every parent's worst nightmare, the Masked Singer UK star panicked as she realised she had left her phone and newborn baby inside.

The star then started frantically searching her pockets while carrying her one-and-a-half-year-old son Fred. 

Katherine then shared a follow-up video to her Instagram story to reassure concerned fans that her daughter was safe inside at the time.

During the video, the mum-of-three held her baby girl in her arms as she relaxed and told her fans that the baby was 'sleeping in a safe space'.

She also confirmed with her many followers that she could see the baby through the window the entire time.

The initial video was first shared by her partner Bobby Koostra, who took to Instagram to share the clip before he rescued Katherine.

And during the video, Katherine can be seen looking up at the camera as she said, 'I did something really bad', hoping that Bobby would see the live video and come to the rescue.

Her partner then captioned the clip with a funny caption: 'My wife locked the baby in the house to get me home from the golf course immediately.'

After the nightmare incident, Katherine took to her stories to share what some fans had said to her after releasing the video footage.

She said, 'Sorry for posting yesterday’s dramatic video with no resolution. A lot of people, especially Gen Zs, are like, “How did he know you needed rescuing? How did he save you if you didn’t have a phone? What did you do?".

The mum-of-three then referenced her 13-year-old daughter Violet and continued by saying, 'And we asked Violet after showing her the video, “What would you do?” She was like, “Throw a brick through the window.”'

The locked-out incident comes after Katherine welcomed her baby girl Fenna Grace back in December.

And her husband Bobby took to Instagram to announce the news alongside an adorable snap of their newborn daughter.

Bobby also shared a picture of Katherine during her 'lengthy' labour, as he praised her 'strength' - before she posted a snap of her placenta after labour.

He shared on Instagram: 'Fenna Grace Kootstra Dec 16, at 12:05am.

'Mom is incredible! Proving her strength repeatedly through the relatively lengthy delivery at home. We are so blessed:)'.

Katherine also shared an adorable son of their son Fred, 18 months, meeting his new sister captioned with the timestamp of 12.05.

She later took to her Story to share that there was a 'glitch' during the birth, which led to things being delayed and 'a bit touch and go' but that she was now fine.

The TV star is also mother to daughter Violet, 12, from a previous relationship.

Katherine revealed she was pregnant with her third child back in July.

The TV personality admitted she learned she was expecting after trying for the first time while still breastfeeding her son Fred, who she welcomed just 13 months ago.

Katherine shared her pregnancy news on her podcast but remained tight-lipped on how far along she was.

She said: 'I'm pregnant, I've been pregnant for a while, and here's how I did that. I got pregnant while breastfeeding the first time I tried and to be honest with you. I don't think it's going to work because I'm 39 - I would have been 38 when I got pregnant.

'And I thought, "We've got to get the kids out of the way''. You never know how long you're gonna have, and I love my kids. I just thought, ''well, let's go for it".'

Katherine had a civil partnership with childhood sweetheart Bobby in December 2019, in a low-key ceremony in Denmark after the pair rekindled their romance.