Marie Eleonor Serneholt is a Swedish singer and model. She was a member of the Swedish pop band A*Teens from 1998 to 2004, and briefly pursued a solo recording career after the band dissolved.

A-Teens are a Swedish pop music group from Stockholm. The group was formed by Niklas Berg in 1998 as an ABBA tribute group called ABBA-Teens, which was later renamed A-Teens. The band members were Marie Serneholt, Amit Paul, Dhani Lennevald, and Sara Lumholdt. The group is best known for the singles "Mamma Mia" (1999) and "Upside Down" (2000), both of which were hits worldwide. The group was particularly successful in their home country where they amassed ten top 10 hit singles on the Swedish charts.