Big Brother's Sunita is to be replaced by a new housemate. She will make her exit at 7pm tonight.
Bookies Paddy Power say they will refund all bets on Sunita since she is leaving of her own accord.
They are also offering bets on who will carry her luggage and who will be the last housemate she kisses before leaving.
Big Brother has not yet announced the new housemate's identity or when they will enter the house.
Sunita is the first person who has decided to leave the UK version of Big Brother voluntarily.
Participants in Big Brother in Holland, Denmark, Argentina and Portugal have previously decided to leave the house.
E4 viewers will be able to watch Sunita's departure live on Big Brother's Little Brother from 7pm.
They will be able to witness her first post-house interview as she talks to presenter Dermot O'Leary.