She spent over a year playing the role on tour before returning to New York to appear off-Broadway in the first American musical adaptation of "Jane Eyre" at the Theater Opera Music Institute. She also appeared in Wendy Wasserstein's one-act play, "Tender Offer" at the New York Ensemble Theater, "All Night Long" at the Second Stage and "Warning Signals" at the Manhattan Theater Club. he made her television debut in 1984 at age 11 as "Samantha Micelli" in the ABC sitcom "Who's The Boss". It ran for eight years, in which time she won three Youth In Film awards for Best Supporting Actress Alyssa: "It was a great way to grow up, but I was sad to see it end. It's like graduating High School when you're sad and excited at the same time."

Alyssa returned to T.V. in her first regular series since "Who's the Boss?", on April 14th, 1997 when Alyssa joined the cast of Fox TV's "Melrose Place". She shot the last six episodes of the 1997 season. And in the 1998 season, she was a regular in all 33 episodes of the show. Alyssa played Jennifer Mancini, younger sister to Michael Mancini. Upon moving to Los Angeles from Boston, Jennifer started all kinds of trouble. She became Amanda's nemesis, Michael's partner in crime, and a lover to one of the characters!

Alyssa was last seen on the little screen last November as Denise Harris in "To Brave Alaska" , an ABC-TV movie. In the film, Denise and her boyfriend are abandoned in a desperate arctic wilderness and only her determination and strength saves their lives. The film was actually made in Vancouver BC, and Alberta , Canada, and filming it was no walk in the park. Alyssa had to skidoo (snowmobile) two miles each day to the set, and do underwater scenes in a giant water tank. Alyssa: "We had our costumes padded with heat packs, but it got so cold that I would lay on the dog (Newman) to keep warm."

Alyssa has also starred in the TV movies : "The Surrogate" (ABC), "Confessions Of A Sorority Girl" (ShowTime), "The Canterville Ghost" with Sir John Giulgud (BBC), "Driving School" (NBC), "Dance Till Dawn" (NBC), "Candles In The Dark" (Family Channel), and "Casualty Of Love (The Amy Fisher Story)" (CBS). In March, 1998 Alyssa starred in the Disney Original Telefilm "Gold Rush". on "The Wonderful World of Disney". In the telefilm, Alyssa played a young adventurer who set out during the Alaskan Gold Rush to discover her fortune. Alyssa is back on weekly as Phoebe Halliwell in the Spelling produced "Charmed" along side Shannen Doherty and Holly Marie Combs Charmed aires every Wednesday night on the WB Network!