Pratt's new column - titled "YO SPENCER!" - will debut in Radar's April issue, on newsstands March 25, the magazine announced Wednesday.
"Spencer is never afraid to speak his mind," Radar editor Maer Roshan said in a statement. "When asking for advice, it's good to have someone who will be brutally honest with you, and tell it like it is."
The magazine featured Pratt, 24, in a Q&A in its November 2007 issue.