Eva Mendes and Naomi Watts Join Hair Forces

Both actresses are the new faces of hair product giant Pantene

How's this for a pretty pair?

E! News has exclusively learned that Eva Mendes and Naomi Watts have signed multimillion-dollar endorsement deals to serve as the new faces of hair product giant Pantene.

The worldwide multimedia advertising campaign featuring the lovely ladies as the company's "celebrity ambassadors"—unprecedented in its use of two equally high-profile women of distinct hair colors and styles—will launch in July.

"With their undeniable beauty and confidence that women admire, Eva and Naomi are wonderful additions to the Pantene family," Pantene spokeswoman Julie Marchant-Houle tells E! News.

Mendes, who credits Pantene products with helping her "overworked strands" come back to health, will front the company's Breakage to Strength line.

Watts, meanwhile, will support its Flat to Volume collection.

—Reporting by Sheena Rao