It was a happy Sunday for Norwich residents last weekend when many residents of the city woke up to a smiley face across the sky.

Eastern Daily Press: This is the man who drew a smiley face in the sky over Norwich in his Pitts Special aircraft (Willie Cruickshank of the Wildcats Aerobatic team). Picture: DENISE BRADLEYThis is the man who drew a smiley face in the sky over Norwich in his Pitts Special aircraft (Willie Cruickshank of the Wildcats Aerobatic team). Picture: DENISE BRADLEY (Image: Copyright: Archant 2016)

And now we can reveal the man behind the stunt.

Willie Cruickshank, of the Wildcat Aerobatics Display Team, was flying his iconic Pitts Special biplane over the city when he decided to have some fun.

He had previously created the smiley face above the Norwich School, the Sundown Festival and over Snetterton Circuit.

But the piece of sky art which Mr Cruickshank did last weekend was completely unplanned.

Eastern Daily Press: Willie Cruickshank, of the Wildcats Aerobatic team, who drew a smiley face in the sky over Norwich in his Pitts Special aircraft. Picture: DENISE BRADLEYWillie Cruickshank, of the Wildcats Aerobatic team, who drew a smiley face in the sky over Norwich in his Pitts Special aircraft. Picture: DENISE BRADLEY (Image: Copyright: Archant 2016)

'I had dropped my daughter, Maisie, off at rowing at Whitlingham Lake and she was in a really grumpy mood,' he said. 'I then went flying and it was such a beautiful day and when I was cleared to go up to 10,000ft I could see to the Thames and all over west Norfolk.

'I then looked down and saw Whitlingham Lake and I thought I would do the smiley face to try and cheer my daughter up.'

After the Wildcat pilot landed he saw on Twitter that loads of people has tweeted pictures of the face in the sky. Some people thought it was to do with Norwich City's 5-0 win at Carrow Road and some children thought it was from Santa.

Mr Cruickshank added: 'It was just a bit of fun.'