Her younger sister Hannah is the singer (The Hitmen and Her). Gemma self plays piano and guitar. She is singing in Song for Marion (Unfinished song)with Terence Stamp. So I guess she has all the potential to be a good singer.
shareShe does have a really nice speaking voice. She has done an audiobook recording of Lewis Carroll's Alice in Wonderland. I would love hear her do a reading of Prokofiev's Peter and the Wolf.
shareI watched an interview where she said she used to run karaoke nights at a pub in the east end of london.. she was singing all the time.
https://m.youtube.com/watch?v=u6s1CSE6Jnc
At about 4:30 she discusses her singing and even sings a little ditty.
Here's an even better one, a dong from her musical in London... Mostly her singing.
https://m.youtube.com/watch?v=ZeLUhJktO2g