Alissa Anderegg has wanted to be an actress and singer ever since she can remember.

 While Alissa was growing up, she would always make up songs while she danced around her room. When she was three, she started taking ballet classes at a nearby dance studio. At age 5, Alissa attended her first play Annie and immediately knew she wanted to act. Shortly after, she started vocal and acting lessons and added tap and jazz dance to her weekly  lessons.

Alissa started going to to her lessons on a regular basis, singing songs like "Broadway Baby" and "I Enjoy Being a Girl." After winning numerous awards for her  vocal talent, Alissa won the role of "Molly" in Annie.

After Annie, Alissa's career took off. She was signed by a talent agency in San Francisco and was constantly performing in professional theatre, taking dance lessons three times a week at a new studio, and going on auditions. She was also working as a fit model for The Gap  and Old Navy and began competing in jazz and tap dance at her new studio S.S. Dance Express which later was renamed Triple Threat Performing Arts. At age 10, Alissa worked in her first movie, Bee Season  and played the title role in various professional theatre companies.

At age 11, Alissa sang in the movie, Little Miss Sunshine and received her Screen Actors Guild card. Little Miss Sunshine was the top-selling film at the 2006 Sundance Film Festival. After her wonderful experience with Sunshine, Alissa knew that she wanted to also work on camera. Shortly after, Alissa started to take  acting lessons with Marnie Cooper in Studio City. In Summer 2005, Alissa auditioned for the American Girls Revue in the new 48,000 square foot store in Los Angeles. After many rounds of callbacks, Alissa landed a role in the original cast as Molly/Becky. With American Girl, she was also one of eight Ambassadors,was cast in a second role in which she played Katie/Kit/Kirsten, and in the American Girl Holiday show as Susan, all the Los Angeles and West Coast premieres of each show.

After Alissa won the role in the Los Angeles musical, she started studying voice with Billy Purnell and was booked with an LA agency. She has since been in many more commercials, industrials, movies, and theatre shows including starring in the Los Angeles premiere of Parade by Jason Robert Brown and Alfred Uhry.