Once a Roo, always a blue: United striker Rooney shows his true colours by tweeting a snap of son Kai in Everton kit

His father might play for Manchester United but it appears that Kai Rooney’s loyalty lies with Everton.

The 19-month-old son of Coleen and Wayne Rooney was seen wearing the blue stripe while clutching a green toy snake.

Rooney, 25, who played for Everton from 2002 to 2004 posted the snap of his son to his Twitter page.

Little boy blue: Manchester United striker Wayne Rooney posted a picture of his son Kai wearing an Everton shirt to his Twitter page

Old Trafford regular: Kai has spent plenty of time at Manchester United's home ground and Wayne told his Twitter followers he would post a picture of his son in a red kit

But shortly after he put up the snap he realised that the photo could cause controversy from his Man U fans and  he told followers : ‘He's in his nans house I'll send u all one in his new united kit tomorrow.’

Wayne left his home team to join the side at Old Trafford where he has remained, despite a brief voicing that he wanted to leave the club in October 2010.

Changing colours: Manchester striker Wayne played for Everton from 2002 to 2004 before leaving for Old Trafford

But just days later the the striker made a spectacular U-turn and signed a five year deal with Sir Alex Ferguson.

Yesterday Wayne’s wife Coleen was concentrating on a different sport attending Chester races with her friends and family.

Different sport: While Wayne was causing controversy with Kai's football kit Coleen spent the day at Chester races with her friends and family

Concentration: The mother of one looked lovely in a white dress and she tweeted she had a fun day

And it seemed she had a fun day on the flutter and tweeted: ‘Brilliant night love my family and friends so much!!!! Goodnight godbless x x’

There were a number of familiar faces at the meet with TOWIE’s sister Sam and Billie Faiers also in attendance.

Last week Coleen and Wayne enjoyed a trip to St Tropez aboard a luxury boat topping up their tans after spending a family holiday in Barbados in June.