Megan Fox acting debut in 2001 film Holiday in the Sun

When Megan Fox was 16, she made her acting debut in the 2001 film Holiday in the Sun, as the spoiled heiress Brianna Wallace and rival of Alex Stewart (Ashley Olsen). The film was released Direct-to-DVD on November 20, 2001.
In 2002 Fox landed the lead main role as Ione Star on the television series Ocean Ave. The series lasted two seasons, from 2002-2003 and Fox appeared in 122 one-hour-long episodes. Fox also served as an uncredited extra in Bad Boys II in 2003.
Also in 2002, she guest-starred on What I Like About You, appearing in the episode "Like a Virgin (Kinda)".
In 2004 Fox guest-starred on Two and a Half Men in the episode "Carmel Filters and Pheromones". Also in 2004, Fox made her film debut in Confessions of a Teenage Drama Queen co-starring opposite Lindsay Lohan. In the film Fox plays a supporting role Carla Santi, a rival of Lola (Lindsay Lohan).
Also in 2004, Fox was cast as a recurring role on the ABC sitcom Hope & Faith, in which she portrayed Sydney Shanowski, replacing Nicole Paggi in the role. In 2006 the television show was canceled due to poor ratings. Fox appeared in 36 episodes from seasons 2 to 3.

more information: wikipedia - Megan Fox