Gemma and Harry Styles

The One Direction hitmaker's older sibling Gemma is allegedly planning to release an album in the hopes of taking over the charts like her superstar brother.

According to the Daily Star newspaper, the 22-year-old aspiring singer has already recorded a demo, which has been the subject of online speculation amongst 1D fans for months.

The blonde has been inundated with messages from eager Harry fans asking when they can hear her music, but Gemma has so far kept quiet about her pop plans.

Harry previously revealed his sister was very musically inclined and has been giving him advice about what bands to listen to.

He said: "I actually get a lot of music from my sister, who's into all these bands. She's been downloading stuff that I get from her."

The 19-year-old star treated his sibling to an all-expenses-paid holiday in the US earlier this year where she got a taste of fame thanks to access-all-areas passes for One Direction's gigs.

He pulled out all the stops with the lavish trip, which was a present for graduating from Sheffield University in the UK with a First-class degree.

A source recently said: "Gemma loves hanging out with her brother and keeping an eye on him.

Harry is in awe of her because she's so brainy and got a first, plus the highest marks in the year.

"He gets homesick sometimes while on tour, so it's great for him to have her there for a while too."