Hilary Duff's older sister Haylie Duff announces she's pregnant with second child

Hilary Duff's older sister, Haylie Duff has announced that she's expecting her second child with her fiancé, Matt Rosenberg.

The 32-year-old singer and actress took to Instagram to announce the news. She posted a photo of her daughter Ryan pointing at her stomach with the caption: 'Round 2! Ryan thinks our new baby is growing in HER belly! #FamilyOf4'.

Her announcement received over 57,000 likes, with over 900 well wishes and congratulatory comments from fans.

'Beyond thrilled for you guys! So exciting!', said one.

'Aww this is so wonderful such great news Haylie. Congratulations', commented another.

Talking to US magazine, Haylie said of the news: 'We are so excited to finally share our good news.

'Ryan is so excited to be a big sister!'

The couple's daughter often appears on Haylie's Instagram, and recently modelled for her mum's new children's clothing line, Little Moon Society.

She captioned it: 'Nothin' but a couple of unicorns @littlemoonsociety holiday capsule is officially in the shop!'

The clothing brand prides itself on being a brand that 'mirror[s] the evolution with timeless pieces [that] can be handed down from sibling to sibling, cousin to cousin, friend to friend, one unique and beautiful child to another.' Sounds like baby number two will be set for a whole new wardrobe already!

Often pictured looking happy playing with her school friends or with her parents, Ryan will no doubt welcome having a little brother or sister.

Haylie and Matt got together back in 2012 and after a year and a half of dating, Matt popped the question on April Fool's Day in 2014.

Soon after, the couple found out Haylie was pregnant with Ryan and decided to postpone their wedding plans and chose to enjoy their time together and as new parents first, without the added stress of planning a wedding. With the news of this second pregnancy, their wedding might be on hold again.