The singer has a laugh with his band mate
The singer, 19, grabbed Zayn‘s crotch through his trousers at their show in Atlanta, Georgia on Friday.
In a photo of the very personal moment, Zayn, 20, doesn’t look too bothered and pulls a mock surprised face as he puts his hand over Harry‘s.
The Bradford-born star is dressed very casually in tracksuit bottoms, a baggy top and a white cap, while Harry shows off a very tanned arm in a grey vest.
This isn’t the first time in recent days that Harry and Zayn have got jokey with each other.
Last week, Zayn cheekily ate a sweet from an edible thong that curly-haired heartthrob Harry had put on during their concert in Columbus, Ohio.
The 1D lads love messing around and often pull pranks – something which is likely to have been filmed for their documentary movie This Is Us, which is set for release in August.
‘Nothing at all was scripted. You know if we are asked the questions… we just answer naturally,’ Louis Tomlinson, 21, tells Total Film.
‘Because I think that’s the most important part, that we show people who we are. And you know, to do that we can’t have anything scripted. So it’s all a reality.’
SEE PICTURES Harry Styles and One Direction are measured for wax Madame Tussauds models
VIDEO: One Direction‘s Harry Styles supports Cancer Research UK
VIDEO: One Direction coming soon
VIDEO: Teen Now meets One Direction part 1
VIDEO: Teen Now meets One Direction part 2
VIDEO: One Direction at Capital FM Jingle Bell Ball part 2