Samantha “Sammi” Slott is the oldest daughter of Frank Gallagher and Queenie Slott, revealed when sought out by Frank when he needs a liver transplant corroded by his alcoholism. She lives in a trailer in a rundown neighborhood with just her son, Chuckie. Unaware that he’s her father upon meeting him, she is sexually attracted to him.
Frank accidentally reveals the truth when she informs him that she cannot give him her liver, as she is not a match.
Although intensely enraged at her unintentional supposed moral crime, she quickly accepts him back and becomes his caretaker. Frank explains that his estrangement from her stems from his youthful immaturity when he became a father, his initial desire to abort her, and his uncertainty about how he impregnated her mother.
It is not revealed who fathered Sammi’s son, Chuckie. Sammi takes the role of main antagonist for season five by coming between Ian and Mickey because her son ends up in being arrested after Carl Gallagher taped heroine to his body.
Portrayed by: Emily Bergl