Alicia was born on October 4, 1976 in San Francisco, California. Her parents, Monty Silverstone, a real estate investor, and Didi, a former airline stewardess are both English and Alicia spent some of her summers as a child in England whilst having a Jewish up-bringing in the San Francisco bay area. She has two older siblings and she also owns a dog named Samson, who is part rottweiler, part doberman and part pitbull.

Her early professional credits include a Domino's Pizza commercial and a guest role on 'The Wonder Years'. She made her stage debut in Los Angeles at the Met Theatre playing a cocaine addict in 'Carol's Eve' but her big break came in 1993 with the lead role in the film,'The Crush', starring alongside Cary Elwes. This led to her being cast in three Aerosmith music videos boosting her popularity. She also won roles in a couple of TV movies allowing her to co-star with recognised actors such as Raquel Welch and Tyne Daly. After a series of moderately successful movies, of which some were given straight-to-video releases, she finally found widespread recognition starring as Cher in the hit comedy, 'Clueless'. On the strength of this, Columbia Pictures have signed a multi-million dollar deal with Alicia giving her the opportunity to produce several films, beginning with the soon-to-be-released 'Excess Baggage'.

Alicia has always been down-to-earth and strong of will, achieving status as an emancipated minor at the age of fifteen in order to work longer hours on her debut film, 'The Crush'. She is adamant about her no-nudity policy in her films and repeatedly turned down her role in 'The Babysitter' until all nudity was axed from the script. Most recently, she is set to co-star alongside George Clooney and Chris O'Donnell in the latest Batman adventure, 'Batman and Robin', playing the role of Batgirl.