The 'You Already Know' singer and the 44-year-old actor have revealed they went their separate ways earlier this year, but kept the news private for some time in order to "adjust" to the situation.
And the pair - who started dating in September 2004 and married in January 2009 - have vowed to remain "united" to support their four-year-old son Axl.
They said in a statement: "With absolute love and respect, we decided to separate as a couple earlier this year."
"To give our family the best opportunity to adjust, we wanted to keep this a private matter before sharing it with the public. We are and will always be united in our support of each other and our family."