Though Sen is mainly popular as a film and television actress, she started as a theatre artist. In 1984 she made her acting debut in a local theatre group. In 1985 she acted in a play named Baluchari which was staged at Star Theatre, Kolkata and continued for 500 shows. Besides acting she has also written plays. A play, Swarger Kache written by Sen was staged by Bengali theatre group Rangmahal.