$150,000 dress stolen from Lupita Nyong'o's West Hollywood hotel.

The '12 Years A Slave' actress has reported to the police that her $150,000 customised Calvin Klein dress – adorned in pearls - was stolen right out of her hotel room on Tuesday, February 24.

According to TMZ, law enforcement officers claim the dress was taken from The London West Hotel in Hollywood.

Lupita's famous dress was praised by most fashion analists for its astonishing details and time used to create it for her for the special occasion.

The dress is made of pearls ... 6,000 whiteAkoya pearls. It's valued at $150,000.

Our sources say Lupita told cops it was taken from her room sometime between 8 AM and 9 PM Tuesday ... while she was gone.

The police will open an investigation and reportedly looking for security footage at the hotel to get the thief