Mark Alexander Ballas Jr. (born May 24, 1986)[1] is an American dancer, choreographer, singer-songwriter, musician, and actor.

[6] His paternal grandfather, George Ballas, was the inventor of the Weed Eater lawn-trimming device.

His paternal great-grandparents, Karolos ("Charles") Ballas and Maria Lymnaos were immigrants to the United States from Greece.

Ballas played an extra in Harry Potter and the Sorcerer's Stone as part of the Hufflepuff House.

[13] On September 6, 2016, it was announced that Ballas would be the final actor to portray the role of Frankie Valli in the Broadway cast of Jersey Boys before it closes in 2017.

On May 26, 2018, it was announced that he would play the role of the Teen Angel in the 2018 Toronto revival of Grease in a limited engagement from June 7–10.

[14][non-primary source needed] From September 11, 2018, to November 18, 2018, Ballas portrayed Charlie Price in the musical Kinky Boots on Broadway.

Ballas's partner for season 6 of Dancing with the Stars was Olympic Gold Medal-winning figure skater Kristi Yamaguchi.

For his choreography with Kane, specifically the Jive ("I Write Sins Not Tragedies"), Viennese Waltz ("Hedwig's Theme") and Waltz ("My Love") dances, Ballas was nominated for that year's Primetime Emmy Award for Outstanding Choreography.

For season 13, Ballas was partnered with reality star Kristin Cavallari where they were the 3rd couple eliminated finishing in 10th place.

In spite of this, they retained a higher average than a few couples that easily outlasted them, including Nancy Grace & Tristan MacManus, the quarter-finalists of the season.

For season 19, he partnered with Duck Dynasty star Sadie Robertson and finished in 2nd place behind Alfonso Ribeiro.

The couple was shockingly eliminated in week 7, finishing in seventh place despite receiving high scores throughout the season.

[18] Ballas returned as a professional dancer for season 25, and was paired with violinist Lindsey Stirling.

In his time on Dancing With the Stars, Ballas has set, and broken, numerous records in the course of his 20 seasons.