In 1997, still barely 18, Brook started getting work presenting youth television programmes on MTV, Granada Television, and the Trouble TV channel . Brook had a breakthrough into mainstream presenting in January 1999 when she was chosen to replace Denise van Outen as the female half of The Big Breakfast hosting team, alongside Johnny Vaughan. She decided to leave the show in July, 1999. Following her departure she picked up roles presenting for MTV again. In 2005, she hosted the reality television programme Celebrity Love Island for ITV.
