Mantock became a partial scholar in the Arts Educational School and took up her degree in a musical theater there.
When Mantock became part of the Casualty series, Mantock was still in a drama school.
She appeared on 36 episodes of the series in one year, which is not bad for a newcomer.
Mantock finally had the opportunity to play a major role when she moved to the United States for The Tomorrow People film, playing the character of Astrid.
Hoping to meet someone special for a hot, sexual relationship or even just a quick fling? Oliver Kent, the Casualty series producer, felt delighted that Mantock became part of the cast.
In 2017, Madeleine starred in Breaking Brooklyn.