It was announced this morning that former Emmerdale actress Jenna-Louise Coleman will be joining Matt Smith in the Tardis, making her debut in the Doctor Who Christmas special. The 25-year-old actress, who also starred in BBC1 drama Waterloo Road, has already been nominated for several awards for these roles - find out more here.

We want to hear what you think about the new companion. Was it time for Karen Gillan to leave, and will Jenna-Louise make a good replacement? Do you remember her in any of her previous roles? Post a comment below and let us know...