Tate will join the Cowboys from the New Zealand Warriors from the beginning of next season after two years with the Auckland-based club.
And the former Brisbane Broncos centre says he is delighted to be making the move back to his native Queensland.
He said: “I am looking forward to joining the Cowboys in 2011 and beyond. It has been a huge decision for me and my family but as a Queenslander it will be great to play back in my home State”.
“I’m looking forward to contributing to the Cowboys in achieving NRL success.”
But he added that he is committed to helping the Warriors achieve success in 2010.
He added:“I have a huge attachment to the Vodafone Warriors. It’s a great club to be a part of and I love being here”.
“That’s why it has been the toughest decision I’ve ever had to make deciding to leave.
“While the Vodafone Warriors came up with a big offer for me to stay in the end it wasn’t about the offers. It was about a family choice to return to Australia and it was also about me considering my options post-football.
“It’s not over yet, though. My aim is to do all I can to help the Vodafone Warriors finish this season well.”
Tate has played 19 tests for the Kangaroos and 15 State of Origin matches for Queensland.
Cowboys coach Neil Henry is delighted that the club has secured Tate’s signature.
“To have a player of his standing in the game come to our club is great for our future,” Henry said.
“He will be great for our leadership and a role model for our younger players.”
“I’ve had the pleasure of working with Brent on a number of State of Origin campaigns and have always had a very good working relationship with him, and I look forward to being reacquainted when he moves to Townsville.“