The Girl on the Train opens in cinemas on October 5.
The show depicted why it is a horrible idea to have children at an early age, but Farrah was clueless to the fact.
After playing a few guest roles in British television, She later moved to Los Angeles where she can impress slack-jawed Americans with her posh British accent.
She got her career start at six, when she appeared on a children's game show called 1982.