One Direction's Harry: "Arnold Schwarzenegger's Daughter Has Been Watching Us In Studio"

1 February 2012, 08:28 | Updated: 1 February 2012, 08:44

The 'One Thing' singer admits he thinks it would be interesting having the Hollywood action star as his father-in-law.

One Direction star Harry Styles has revealed that Arnold Schwarzenegger's daughter Katherine has been watching the band in the studio.

The 22-year-old author admitted her admiration of the 'What Makes You Beautiful' singer via her Twitter account earlier this week.

Harry, who was in the US with his band mates filming the Nickelodeon show iCarly, confessed to The Sun that the 'Terminator' star's daughter has been keeping a close eye on the group.

"Katherine's been in the studio watching us. Imagine having Arnie as your dad-in-law."

Harry then went on to offer his best impression of the Austrian star.

"Leave my house if you want to live."

Earlier today (1^st February), Katherine took to her Twitter account to make reference to online abuse she has received from fellow admirers of the star.

"Woah! All you young ladies need to calm down! Crazies," she tweeted.

Meanwhile, the singer – who is celebrating his 18^th Birthday today – is rumoured to be spending the day with his former girlfriend Caroline Flack.