Interpublic today reported a 24.9 percent rise in fourth-quarter net to $278.3M on a 3.4 percent revenue uptick to $2.1B.

CEO Michael Roth said the ad/PR combine benefitted from investments in digital talent, robust growth in overseas markets and vitality in the U.S.

Organic growth rose 2.8 percent for the quarter and 6.1 percent for the full-year. Roth predicts organic growth to advance three percent in 2012.

Harris Diamond, who heads Weber Shandwick and IPG’s constituency management group, told O’Dwyer’s PR organic growth rose a “fantastic” 13.5 percent during Q4 and 10 percent for the year driven by across-the-board business spurts. Digital, social media, consumer, high-tech and healthcare were stand-out performers.

Citing great strides in putting IPG’s financial house in order, Roth announced a $300M share repurchase program.

For the full-year, IPG earned $551.5M vs. $261.1M in 2010.