Growing up in Cambridge, England, a life in Hollywood seemed far off for Rebecca, however at a young age, fate would land her in New York City working as a model. Within one year of living in New York, she appeared in advertisements for L’Oreal, Colgate and Wella Hair, while at the same time auditioning for film and television. Mader began her career on screen appearing on ABC daytime soap operas All My Children, One Life To Live and CBS’s Guiding Light, which catalyzed Rebecca to pursue acting full time.
Rebecca worked consistently booking guest spots, then in 2006 she booked a series regular role on the Fox legal drama, Justice opposite Victor Garber and Kerr Smith. Mader’s big break came two years later when she was cast on ABC’s Lost as series regular “Charlotte Lewis.” Though the character was originally written as American, Mader convinced producers Damon Lindelof and Carlton Cuse to make her British, and her eight-episode stint soon grew to 20 episodes. While “Charlotte” experienced an untimely death like so many of her island companions, Rebecca’s career continued forward at a vigorous pace with recurring roles on ABC’s No Ordinary Family from creator Greg Berlanti and Fox’s Fringe. During this time she also focused on honing her comedic chops, with fantastic comedic guest star roles on Stella, Friends with Benefits and 30 Rock. Rebecca’s dreams of working in comedy came true in 2012 when she was cast in the ABC ½ multi-comedy series, Work It. The show gave Rebecca the opportunity to showcase her charm and personality, which garnered notice by Hollywood creative’s.
Highlights of Mader’s film credits include Fox 2000’s The Devil Wears Prada, where she played fashion editor “Jocelyn” opposite Meryl Streep and Anne Hathaway. She followed up Prada starring as Ewan McGregor’s ex-wife in The Men Who Stare at Goats, also co-starring George Clooney, Kevin Spacey, and Jeff Bridges. In 2010, she booked the Max Winkler directed coming-of age romantic comedy, Ceremony opposite Uma Thurman and Michael Angarano and the Antonio Banderas noir mystery, The Big Bang playing meth addict “Zooey.” Most recently, she was featured in 2013’s box office hit, Iron Man 3.
Recently, Rebecca was upped to Series Regular for the 5th Season of ABC's hit Television Drama Once Upon A Time, as the delightfully evil and compelling Wicked Witch of the West.
Rebecca currently resides in Los Angeles.