Thuy Nguyen

is an adult housemate in Pinoy Big Brother 7

She first entered the house on Day 3 of the season during the Celebrity Edition where in she pretended to be as one of the three Vietnamese finalists and eventually the winner for Big Brother Vietnam to test the Celebrity housemates' hospitality and patience. After her fake win as the Big Brother Vietnam winner, Big Brother sent her back to the house where her real status was revealed. It was revealed that she will be a house guest for the Celebrity Edition and has to help the celebrities on their Lucky 7 tasks. She must also believe that she is Vietnamese winner and must not speak English or Filipino at all times, only Vietnamese. If the celebrities won six out of seven tasks and if she convinced the housemates that she really is the winner of Big Brother Vietnam, she will become a fully pledged housemate to compete on the season's regular civilan edition.

Biography
Thuy is of Vietnamese descent. Her whole family together with thousands of Vietnamese families migrated to the Philippines as refugees of the Vietnam War. She was born and grew up in Tacloban City in the Province of Leyte. During her teenage years, she was sent to California by their fellow Vietnamese refugees to help finish her studies abroad.

Trivia

 * Prior to her first entry on Pinoy Big Brother 7, she never set foot in Vietnam.
 * The Celebrity Edition of Pinoy Big Brother 7 used the Big Brother Vietnam's house.
 * Thuy is the first Vietnamese woman to enter the Pinoy Big Brother House.