Charlotte Gainsbourg bares baby bump in sheer Cannes dress

(CBS) Pregnant  French actress and singer Charlotte Gainsbourg put a sheer spin on maternity wear at the Cannes premiere of her new movie, "Melancholia," on Wednesday.

Gainsbourg, who is expecting her third child with partner Yvan Attal, stepped out in a wrapped, see-through black dress draped over a lacy bra, putting her burgeoning baby bump on full display.

Pictures: Cannes Film Festival 2011

The 39-year-old finished her look with simple hair and strappy black and green heels

Gainsbourg hit the red carpet with her costar Kiersten Dunst and director Las Von Trier, who was expelledby the Cannes Film Festival on Thursday for his "I'm a Nazi" comment.

Gainsbourg, whose past films include "21 Grams," "The Science of Sleep," "Antichrist," and "Golden Door," is the daughter of French pop artist Serge Gainsbourg and English actress Jane Birkin. 

Tell us: What do you think of Gainsbourg's look?