Rebecca "Becky" Thatcher es protagonista en Las aventuras de Tom Sawyer. Ella acompaña a un niño llamado Tom Sawyer, que actúa como su interés amoroso a lo largo del libro;
Becky Thatcher, while playing a prominent role throughout the events of the original novel, is not seen again throughout any other subsequent sequels.
Becky is the daughter of Judge Thatcher, and she is known for her love interest with Tom Sawyer. Her long blonde hair is always worn in braids. She wins Tom's love from the first moment he sees her. When Becky first encounters Tom, she gives him a pansy to show her love. Becky Thatcher soon becomes "engaged" to Tom Sawyer, sealing their engagement with a kiss on the lips. When Tom mentions that he used to be with Amy Lawrence, Becky believes that Tom still loves her and gets angry at him. Tom wins her back by telling a lie and taking the blame for her vandalizing their teacher's anatomy book, which Becky had accidentally ruined.