Sofia Richie Grainge is expecting her second child

Sofia - who is the daughter of singer Lionel Richie and fashion designer Diane Alexander - announced the baby news on her Instagram page by sharing a picture of her bump ahead of a launch event for her new fashion label, SRG Atelier.

She wrote in the caption: "On my way to launch these babies [baby emoji] + @srgatelier"

Several stars congratulated her on the news, including American actress and singer Vanessa Hudgens.

She wrote: "Yessss back to back babyyyyy (sic)"

Influencer Abbie Herbert commented: "Omg congratulations"

Lingerie brand Victoria's Secret posted: "Congratulations"

Last year, Sofia opened up about her first pregnancy, admitting she was "absolutely terrified" when she started having contractions six weeks before giving birth.

Speaking on the She MD podcast, she said: "I'm actually really excited to be here with you guys today just because now that I have my child, I'm like, I feel like people really don't talk about all the things that go wrong and all the things after you give birth that are so hard.

"At 32 weeks I woke up and I was like, 'Hey, I woke up and I'm really tired today. My back really hurts. I feel a little crampy.' And I really thought it was going to be another one of those, 'Yeah, babe, that's pregnancy. You're going to be fine, but you can come in if you want me to check you' type situations.

"She was like, 'You know what? Actually, I think you should go see the fetal specialist to monitor, to make sure that everything's okay, and then you'll go home. It's not a big deal.

"Thank God she said that. ., "because they hooked me up to the monitor and they were like, 'You're in active labour.' I was really terrified."

Subsequently, Sofia was in hospital for six days before she "begged" to be sent home.

She was allowed home, but was put on bed rest.

Sofia said: "I was begging. I was like, 'Please, please let me go home.' And she was like, 'You can go home, but you're on bed rest. We have to monitor you.'

So that's what I did. It was kind of a waiting game from there."