Billie Piper plays Rose Tyler who first met the ninth doctor when his Tardis landed on her south London estate
She became one of the most popular assistants with her Cockney charm and strong will
During her time, she's faced some really frightening monsters - like the Doctor's arch enemies, the Daleks
And the Doctor and Rose took on the ultra scary Cybermen in a parallel world
As well as travelling into the future, Rose and the Doctor have visited some historical events. Queen Victoria was not amused by their antics!
The Tardis-travelling pair even dropped into the Queen's coronation in 1953 - and foiled a deadly plot
It's not all glamour as the Doctor's assistant - Rose had to go undercover as a dinner lady when strange things started happening at a school
Things looked bleak when Rose and the Doctor lost their Tardis in The Satan Pit
And Rose's body was taken over by the last remaining human in the future, Cassandra
And Cassandra soon got to work getting what she wanted: a kiss from the Doctor!
But now it's the end of Tardis fun for Rose as Billie Piper leaves the series in what the writers describe as "a stunning exit."