The trio is in town for the 2015 Cannes Film Festival.
The night before, Charlize and Sean coupled up as they hit the red carpet at the premiere of her new film Mad Max: Fury Road, which Naomi also attended.
FYI: Naomi is wearing Steven Alan Optical sunglasses.
20+ pictures inside of Charlize Theron, Sean Penn, and Naomi Watts in Cannes… More Here! »