Rick Perry to Announce GOP Candidacy Saturday

Texas Gov. Rick Perry will make "a definitive announcement that he is in the 2012 race for the presidency Saturday," aides told Fox News.

The governor's Spokesman Mark Miner confirmed late Thursday that Perry will enter the race. 

"This is it," a Perry source told Fox News. "No exploratory committee, no more deliberation."

Perry will spend most of next week on the road officially campaigning.

Team Perry acknowledges they had only been hinting about a run earlier, but now tells Fox News first that Saturday is the official launch.