Soumitrisha Kundu (সৌমিতৃষা কুণ্ডু), also known by the initialism STK, is an Indian actress who works in Bengali film and television industry. Acclaimed for her acting skills, she is one of the promising young actresses in the Bengali Film Industry. She made her acting debut in the drama series E Amar Gurudakshina (2017) and became well known for portraying the female lead Mithai and her lookalike Mithi in Mithai (2021).

She made her film debut with Avijit Sen's Pradhan (2023) portraying the female lead Rumi Pradhan opposite Dev. The film became one of the major successes of the year while Kundu's performance, screen presence and chemistry with her co-stars were well-received. Subsequently, she received her first Filmfare Awards Bangla nomination for Best Female Debut for the film. In January 2025, Kundu was appointed as the brand ambassador for ABP Ananda and ABP Onestop Weddings.

Kundu was born on 24 February 2002 in Barasat, North 24 Parganas in West Bengal. She did her higher secondary in Humanities and completed her education from Barasat Girls' High School. She took admission in St. Paul's Cathedral Mission College for her Bachelor's degree in English, but couldn't complete her course owing to her work pressure. Her family members also suggested her to focus on either studies or acting; and she chose the latter, following her passion. Later, she completed her graduation in English Pass from Netaji Subhas Open University.

A single child, she mentioned in an interview that she shares a close relationship with her family and credited her parents for giving her confidence and encouraging her professionally. She has mentioned in an interview that sketching, singing and dancing as her occasional habits. She named Sridevi as her acting inspiration. Popular in the media; her looks, personality, fashion and artistry have received considerable public attention. She is quite active on her social profiles and regularly interacts with her fans and followers. She is a Lord Krishna devotee and visited Vrindavan to mark her 23rd birthday.

Kundu started her career with the television series E Amar Gurudakshina in 2017. She has also featured in a number of shows like Jai Kali Kalkattawali, Aloukik Na Loukik and Gopal Bhar. She got her breakthrough as a lead in Kone Bou in 2019. In January, 2021 she was cast and had started portraying the dual characters Mithai/Mithi in Mithai which wrapped up in June 2023.

Kundu made her film debut with Avijit Sen's Pradhan opposite Dev in 2023. Released on the occasion of Christmas vacations, the film became a major critical and commercial success, emerging as the second highest grossing Bengali film of 2023. Kundu portrayed the female lead Rumi Pradhan and received praise for her performance, screen presence and chemistry with her co-stars. She was further nominated for the 7th Filmfare Awards Bangla in the Best Female Debut category for the film. Kundu made her OTT debut in 2024, playing the lead role in the Ayan Chakraborti directorial murder-mystery drama series Kaalratri on Hoichoi. In 2025, she played the female lead in Rupak Chakraborty's thriller drama film 10e June opposite Sourav Das.