The truth is out in the "Big Brother" house - Frankie is Ariana Grande's brother.

The 31-year old "Big Brother" house guest, Frankie, finally told his cast members on Friday that he has been lying to them the entire time, sharing that they don't know really know his true identity.

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In a rather obvious move to avoid being voted out, he decided to tell everyone that his sister is no other than pop superstar, Ariana Grande.

"My name is Frankie J. Grande. I have been hiding this secret every day and it has been eating my soul every day," he shared.

A number of his housemates went wild, especially Victoria, who is both Frankie's frenemy and a big fan of his sister. "Oh my God! I'm gonna kill you!" Victoria exclaimed.

Caleb immediately felt that Frankie could help him kickstart his music career, while Christine thought that Frankie could help her husband with his musical aspirations.

However, some were a little less than impressed at the revelation.

Later on, Nicole confessed that she was worried about voting Frankie out "because he's famous", to which Cody disagreed, saying that he isn't - his sister is.

Frankie, who refers to himself as a "media mogul" because of his YouTube fame, also revealed to the others that he is "playing for charity" and if he wins, he plans to use the money to build schools in Africa. This revelation goes against Frankie's pre-season confession that he wants to win the money because being a pop star's brother has not made him rich. "We are completely separate people," he added.

While Frankie may or may not give the money to charity, sister Ariana Grande certainly is proud that her brother has come out with the truth.

She took to Twitter to send a message to her brother. She wrote, "Frankie might've just saved his game tonight!!! werrk @FrankieJGrande! told his whole truth & apologized for playing dirty like a man. proud."

TagsFrankie, Ariana Grande, brother, Big Brother