The two became engaged in November after three years of dating,  and were married on November 25, Malibu, California. At the age of 11, he earned a full-time slot at the Italia Conti Academy of Theatre Arts in London, as well as earning a full scholarship.
In , he was awarded "Performer of the Year". In October , Ballas made a guest appearance on the season premiere of Samantha Who. On May 26, , it was announced that he would play the role of the Teen Angel in the Toronto revival of Grease in a limited engagement from June . On October 30, , the pair was voted off the show. They have been the only couple invited back for an exhibition dance.
They won the series. They were the third couple eliminated, finishing in eleventh place, on September 30, For the eighth season of Dancing with the Stars , Ballas was paired with Olympic gold-medal winning gymnast Shawn Johnson , winning that season's competition on May 19, He was partnered with actress Melissa Joan Hart for the show's ninth season. They were voted off in week six and came in 9th place. For season 10 , Ballas was partnered with actress Shannen Doherty.
Vice Presidential candidate Sarah Palin. They made it to the finale and finished in third place. They made it to the finals where they finished in third place.
For season 13 , Ballas was partnered with reality star Kristin Cavallari where they were the 3rd couple eliminated finishing in 10th place.
For season 14 , he was partnered with Classical Singer Katherine Jenkins. For season 15 , he returned with season 11 partner, Bristol Palin. In week 7, he danced with former partner Shawn Johnson because her partner, Derek Hough suffered a neck injury.
He was paired with two-time Olympic champion Aly Raisman for season Since season 16 had four couples reach the finals for the first time, Aly and Mark were able to become finalists. On May 21, however, they were eliminated at the beginning of the show landing them in fourth place.
For season 17 , he was paired with singer Christina Milian. They were the 4th couple eliminated despite receiving high scores and good comments from the judges.
The couple made it to the finals and ended in third place. The couple was shockingly eliminated in week 7, finishing in seventh place despite receiving high scores throughout the season.
For season 21 , he was partnered with actress Alexa PenaVega. They were eliminated in week 9 despite being at the top of the leaderboard that week and finished the competition in 6th place. Ballas and VanZant made it to the finals of the show and finished in second place.
Ballas and Stirling made it to the finals and finished in second place.