Mark Ballas or Mark Alexander Ballas Jr. (born May 24, 1986) is an American dancer. At a young age, he moved to London, in the UK, where he began his performing career. He remained in London until 2007, when he moved back to the US.
Ballas is a professional ballroom dancer on the ABC program Dancing with the Stars. He began competing on the show in the fall of 2007. He is also a singer/songwriter/musician for the group Ballas Hough Band, where he composes the group's music, plays lead guitar and sings lead vocals.
As an actor, Mark Ballas played the lead role of Tony in the musical Copacabana and was the lead dancer in the UK national tour of the Spanish musical Maria de Buenos Aires. He was also the understudy for the role of Ritchie Valens in the UK national tour of Buddy, The Buddy Holly Story.
Ballas played an extra in Harry Potter and the Sorcerer's Stone as part of the Hufflepuff House. In October 2008, Ballas made a guest appearance on the season premiere of Samantha Who. In September 2010, Ballas had a guest appearance on his former Dancing with the Stars partner Melissa Joan Hart's new series, Melissa & Joey.