Mamta's breakthrough role came with the 2005 film "Chronicum," which earned her critical acclaim and commercial success. Her portrayal of a strong-willed and independent woman in the film showcased her acting prowess. This led to more significant roles in films like "Half a Baby" (2006), "Adoor Bhasi" (2006), and "Katha Parayumpol" (2007).

Mamta's filmography boasts an impressive array of critically acclaimed and commercially successful films. Some of her notable works include: