Mehta began dating her "12/24 Karol Bagh" co-star Ravi Dubey in 2009, and married him in December 2013. On 5 February 2013, In an interview with IndiaTimes, Mehta said that she and Dubey "always shared a good bond and understanding. But after doing "Nach Baliye" together we understand each other professionally more." After marrying, she changed her name to Sargun Mehta Dubey. Mehta began her career with theatre shows. During her three years in college in Delhi, she performed in several theatrical productions. Later, she was selected for the supporting role in Zee TV's 2009 television programme "12/24 Karol Bagh". In it, she appeared opposite Ravi Dubey in the role of Neetu Sethi, an effervescent young woman. The show tells the story of four children, Simi, Anuj, Neetu and Mili, of the Sethi family, which lives in the middle-class locality of Karol Bagh in Delhi. Neetu is the third sibling out of the four, who is married to the mentally challenged Omi (played by Ravi Dubey). In an interview with "The Hindu", Mehta said that she gained the role by accident: "My friends and I from the theatre club were asked by one of our professors to audition for the role and I landed Neetu's part". Following the programme's end, Mehta portrayed the lead in another Zee TV production, "Apno Ke Liye Geeta Ka Dharmayudh". In the show, which first aired in December 2010, she played the role of Geeta, who stands up for truth and saves her family from being ruined because of the misuse of section 498A which aims to protect women from domestic violence and abuse. On May 2011, the show went off-air after it failed to gain popularity. In January 2011, Mehta featured as the lead protagonist opposite Ajay Chaudhary in Siddharth Tewary's drama series "Phulwa" on Colors TV, in which she played the title role. The story is loosely based on the life of Phoolan Devi, the dacoit-turned politician. Referencing her work in the series, she said, "when I did Phulwa it became the significant turning point of my career, which gave me recognition and creative satisfaction as well". The following year, she appeared in an episode of Sony television's crime series "Crime Patrol", as Aarti Shekhar.