This amazing footage shows the moment a plane drew a heart in the the sky to reveal the gender of a couple's baby.

The heartwarming moment was captured by "flabbergasted" onlookers who saw the spectacle from their gardens in Sheffield, South Yorks, on Sunday (June 23)."

The video showed how the skilful pilot had arched his light aircraft upwards and then created a perfect heart using smoke trails.

This shape, set against the sky's blue hues, represented the fact that the happy couple were expecting a son.

One onlooker, who didn't wish to be named, said: "It was quite lovely to see."

"I was sitting in my back garden, and I didn't expect to see anything happen like that. But it was so heartwarming to witness."

"I thought initially it was just an aeroplane flying about and then at one point, smoke started to come out the back of it, which was when I started videoing."

"I was just thinking it was from some type of air show, but then I saw the shape in the sky and realised it was a gender reveal. "

She added: "It was really good to reveal it in that way. But it's obviously an expensive way. It's different."

"You don't normally see stuff like that in Sheffield. Even my kids were flabbergasted to see it."