Kim Kardashian -- Merci, Drunk Chick ... for the 4 AM Wake-Up!!

Kim Kardashian got an early morning wake-up call -- not from her French hotel's front desk -- but from a random drunk woman banging on her door!

According to our sources ... pregnant and hormonal Kim was rousted out of bed at 4 AM when the woman started kicking her Cannes hotel room door, and trying to get in for a tête-à-tête. Kim went to check who was banging, and got treated to a view of the woman lifting up her dress and flashing her.

We're told Kim yelled at the woman to beat it, but she refused to leave -- and Kim had to call security 3 times before they arrived to gave la chick ... le heave-ho.