PARIS Hilton is set to go back to prison - for a West End musical.The hotel heiress, who recently served 23 days in jail for driving with a suspended licence, is to appear in a London stage version of cult Australian TV show Prisoner: Cell Block H.A source said: "Everyone is very excited."There was a real buzz around the show when we thought we would get some well-known Australian soap actors but Paris is a major coup."The casting agents never thought she'd be interested, but before meeting with the directors she researched the show by watching DVDs of the original series."She absolutely loved it and thought it was brilliantly camp."Paris, who is said to have been keen to tread the boards in the West End for some time, is to star as an inmate in the production set in a women-only prison.It is believed her character will be involved in a lesbian romp.The source added: "Paris is keen to stretch herself as an actress so she's happy to kiss another girl for the audience and actually thinks it'll be fun to play a lesbian."She'll also get to stretch her vocal chords and she loves that."If Paris does appear in the West End it will be just the latest addition to her growing list of talents.She has previously starred in a number of films, including House of Wax, released a signature perfume, recorded a pop album, designed her own clothing range, appeared in an adult film and starred in her own reality TV show The Simple Life.