River Song

"Hello Sweetie"

- River's greeting to the Doctor

River Song (born as Melody Pond) is the daughter of Amy Pond and Rory Williams, the wife and occasional companion of The Doctor and a recurring guest character in Doctor Who.

When she was a baby River (then known as Melody) was taken from her parents by the Silence so they could use her as a weapon to kill the Doctor. Due to being a "Child of the Tardis" Melody had the Time Lords ability to regenerate but as River Song she gave the remaining regenerations to revive the Doctor.

She is played by Alex Kingston.