Siobhan Dillon starred in what musical based on Billy Wilder's Academy Award-winning 1950 film of the same title?
Siobhan Dillon: Siobhan Patricia Dillon (born 1 September 1984 in Lichfield, Staffordshire) is an English actress and singer, who rose to fame when she performed in the British talent show-themed television series "How Do You Solve a Problem Like Maria? Siobhan Dillon:  Since then, Dillon has performed in the West End, playing the roles of Sandy in "Grease" at the Piccadilly Theatre, Vivienne Kensington in "Legally Blonde" at the Savoy Theatre, Sally Bowles in "Cabaret", Molly in "Ghost the Musical" at the Piccadilly Theatre, Ellen in "Miss Saigon", and Betty Schaefer in "Sunset Boulevard" with the English National Opera.
i don't know