The twins were born in
Vienna,
Austria on June 16, 1994 and are based in
Liverpool, in the United Kingdom. Known for their YouTube covers of songs by
the Beatles and other 1960s bands, many of which have been issued on a series of albums, they also release original music, inspired by the 1960s. They have toured with
Steve Harley & Cockney Rebel and performed with them at the
Glastonbury Festival in 2017, collaborated with American musician
John Sebastian, as well as held a two-year residency at
the Cavern Club. Their father, Rudolf Wagner, is the band's producer; he also plays bass, piano, co-writes, and arranges their music, which is recorded in the family's own studio. Rudolf's wife and the twins' stepmother, Michaela Wagner, is the band's manager and assistant. The family lived in a small village in the
Groß-Enzersdorf municipality near Vienna until 2014, when they moved to a suburb of
Liverpool. The band typically has a four-person line-up for live concerts, with Mona and Lisa Wagner mostly playing guitars, and some harmonica and ukulele, respectively, on stage, while being backed by different bassists and drummers. In 2012 and 2013, while they were still based in Austria, those musicians were usually Michael Mozeth (bass) and Philipp Wolf (drums). Since 2014, including the two-year residency at the Cavern Club, they have been backed by several local British musicians. ==Musical style and development==