Wayne Rooney has previously spoken about how fatherhood gave him a bigger kick than his football career, describing becoming a dad as the "proudest moment of my life".
He and Coleen were childhood sweethearts and got married in a lavish ceremony in June 2008 when they were both aged 22.
But their relationship has not been without his problems.
Two years ago they were rocked by claims that Rooney had paid a prostitute £1,200 a time for sex while she was pregnant with Kai.
And in 2004 Rooney responded to tabloid claims that he had been to a brothel in Liverpool by admitting he had visited massage parlours and had sex with prostitutes.
A few people guessed, so news is out ha!! Me wayne and Kai are thrilled that we are expecting a new addition to our family around May time x
Its still only early but bursting with excitement! Also wanted the news to come from us, before anyone else! ????
Coleen Rooney has Tweeted to say she and Wayne are expecting their second baby.
She is due to give birth in May next year.
The TV presenter revealed the news on Twitter, telling her 840,000 followers she's "thrilled" with the news.
The couple already have a son, Kai, who was born in November 2009.
Mrs Rooney tweeted: "A few people guessed, so news is out ha!! Me wayne and Kai are thrilled that we are expecting a new addition to our family around May time x."