Former House Speaker Newt Gingrich (R-Ga.) will visit Iowa later this month as speculation heats up over whether or not he will for for president.

The Des Moines Register reported Tuesday that Gingrich will speak at a renewable energy summit on Jan. 25.

The Iowa caucuses are the nation's first presidential primary contests and Gingrich's visit is likely to stoke talk that he could enter the 2012 GOP primary. Gingrich has said that he could announce a decision to run as early as February.

So far, no major GOP candidate has officially entered the race.

Former Minnesota Gov. Tim Pawlenty (R) — another potential candidate — is also scheduled to visit Iowa, just five days after Gingrich.