What movie's name where 2 guys and a lady kidnaps a 6 year old girl and wants to keep her as a child?

The movie you're referring to is likely "Room" (2015). In this film, a young woman and her son are held captive in a small room for years. Although it primarily focuses on their experiences and the bond between mother and child, it deals with themes of captivity and the impact on the child's development. If you meant a different movie, please provide more details for clarification.