Shannen's success in acting came in 1990, at the age of 19, when she secured a part on Aaron Spelling's teen drama, "Beverly Hills, 90210" (1990) as the character Brenda Walsh, who was a teenage twin sister to Brandon Walsh (Jason Priestley). Shannen attracted a lot of attention from the press and eventually gained celebrity status. It was a very successful popular teen drama for the reason that teenage girls everywhere related to Shannen's character, Brenda Walsh. After four years on the show, Shannen left it in 1994. Shannen starred in Almost Dead (1994) and Mallrats (1995) to keep her acting career alive.