Rebecca Adlington has announced she is pregnant with her second child after conceiving during lockdown.

The 31-year-old Olympic swimmer took to her official Instagram to share the beautiful news with her followers as she she shared a sweet snap where she can be seen cradling a growing bump.

In the photo she is joined by her boyfriend Andrew Parsons, 30, who is holding up a scan photo with her.

Cradling her bump with one hand and the other on the scan, Rebecca grinned from ear-to-ear as the soon to be mum-of-two was surrounded by her loved ones as she shared her news.

Rebecca Adlington is pregnant with her second child

Also in the sweet snap was her daughter Summer, five, who she shares with her ex-husband Harry Needs, 28.

Summer could be seen looking like an already proud big sister as she wore a white T-shirt which had written on it: "Promoted to big sister."

Taking to the caption, Rebecca wrote: "Andy and I are excited to announce that we’re expecting.

Rebecca's daughter Summer couldn't hide her excitement

"Summer can’t wait, she asks everyday to check my belly to see if it’s growing. Going to be a long wait until the end of February!"

She followed it up by tagging Andrew and sharing a number of hashtags, with one revealing she is 14 weeks pregnant.

Mocking the fact the baby was conceived during lockdown, she wrote the hashtag: "No social distancing here."

Rebecca Adlington split from ex-husband Harry Needs in 2016
Rebecca Adlington split from ex-husband Harry Needs in 2016

Rebecca also helped Summer create an adorable TikTok video to share the news.

Taking to her Instagram Story, in the clip Summer can be seen transforming into a fairy godmother before waving her wand at her mum's stomach to reveal a baby scan photo.

During lockdown, so Summer could see her father, Rebecca and Andrew stayed at Harry's with his pal Michael Gunning.

Harry and Rebecca went their separate ways in 2016 after being married for 18 months.

Speaking on the lockdown arrangement, a source told The Sun at the time: "Their arrangement is very amicable and they’re doing what’s best for Summer.

"They still get on really well despite their split, so why not? And Harry’s friend Michael is close with the others too.

"They’re all really enjoying each other’s company and, what with their shared interest in swimming, it was a no-brainer."