The 44-year-old actor walked the red carpet at the 72nd annual Cannes Film Festival on Tuesday, to promote his latest film, Once Upon a Time in Hollywood.
DiCaprio, who plays actor Rick Dalton in the Quentin Tarantino-directed film, pulled out all the stops for the outing, stepping out in a luxurious tux from Giorgio Armani.
The actor's girlfriend, Camila Morrone, was also in attendance, showing her support for her beau's new movie. The 21-year-old model walked the red carpet solo in a stunning strapless Miu Miu gown paired with gorgeous jewels from Bulgari.
DiCaprio wasn't the only one Morrone was supporting at the premiere. Her stepfather, Al Pacino, is also in the movie, portraying Marvin Schwartz.
Although the two didn't pose together on the red carpet, paparazzi pics taken over the weekend prove that DiCaprio is quite the doting boyfriend. He was spotted snapping an artsy pic of Morrone, chic in a black-and-white polka dot dress by Alessandra Rich, on his cell phone while the two were walking around Cannes.