Multiple news sources are reporting Mitt Romney will be a speaker at the CPAC 2013 event in March. From the National Review:
Former Republican presidential nominee Mitt Romney will appear at the Conservative Political Action Conference next month, according to two sources familiar with the event’s itinerary. Romney’s speech, which will be delivered at the Gaylord National hotel in Prince George’s County, Md., marks the former Massachusetts governor’s return to the political scene.
Romney will join the following confirmed speakers list found on CPAC’s official site: