Sean Penn is one supportive boyfriend!

Charlize Theron was joined by her main man for the red carpet premiere of her latest film, Mad Max: Fury Road, at the Cannes Film Festival, on Thursday night. These two lovebirds can't get enough of each other!

For the premiere, the 39-year-old glowed in a sunshine yellow Dior frock with a fabulous train. With that dress -- how could those two not be Hollywood's new golden couple?!

For the glamorous night, Penn toned down the formality when he opted for a laid-back black suits sans tie. Oh how suave!

The night before, the Oscar-winning couple couldn't keep their hands off of each other when they dined out at Tetou restaurant.

These two have been inseparable since they got together last January and from everything we've seen we have a feeling that the Milk is going to be popping the question very soon!