Patty Williams is a fictional character from the American CBS soap opera The Young and the Restless.

The character made her debut in 1980 and, after a brief portrayal by Tammy Taylor, Lilibet Stern took over for three years, followed by Andrea Evans until 1984.

The character was re-introduced by former head writer Maria Arena Bell 25 years later in 2009, with Stacy Haiduk taking over the role.

She also suffers from difficult mental health issues which was expressed among other things in her obsession with Jack, and in the crimes that she committed in order to get him.

When Patty catches Jack and Diane together in his office, she is so traumatized that she trips over a plant in the lobby and miscarries.

[14] Later she overhears Jack telling Jill of his plans to have a vasectomy, and that he only married Patty so that his father, John Abbott, would make him president of Jabot.

[14] Patty's father Carl is the police detective in charge of finding Jack's attacker and becomes convinced Jill has done it.

Victor Newman paid for Patty to undergo plastic surgery to look like her psychiatrist, Emily Peterson, in order to infiltrate Jabot and get close to Jack.

Victor's plan backfires as Patty becomes unstable and commits a number of illegal acts in her pursuit of Jack.

Patty struggles to keep others from discovering the truth about the switch, but her erratic behavior makes Jack and Phyllis suspicious.

Patty was last seen with red hair flirting with a man named Alejandro, and she suggested that he call her Mary Jane and him Jack.

It is then revealed that perhaps Patty sewed all the pillows that were left in Diane's room at the Genoa City Athletic Club the night of her murder.

Patty continues to attempt to divert Genevieve from Jack by making things up by telling her the house alarm keeps going off.

Genevieve has Ronan investigate the bizarre occurrences at her house and he requests to speak with "Myrna"; however, Patty continues to divert him, one time by posting a ripped page from Diane's diary on his windshield to keep him from questioning her.

Paul later discovers the security camera pictures of Ashley pushing Diane to the ground on "Myrna"'s laptop, leading into a search for her.

After hiding in the shed at the Newman Ranch for a while, Patty goes to the Genoa City Athletic Club and poses as Emily.

Patty then steals Genevieve's wedding dress and arrives at the church attempting to convince the delivery man she is Jack's personal assistant; however, he does not believe her and she knocks him unconscious.

Patty decided to hide in her brother Todd's church where she meets nephew Ricky Williams, who promised to protect her.

Patty returned briefly when Paul visited her to ask her who helped her break out of the mental facility in 2010; she told him it was Adam.

Seven months later, Patty reappeared when Paul arranged for her to move to Fairview Psychiatric Hospital for her to receive the appropriate treatment, and he was discouraged to find out that his sister's condition had not improved.

When Daisy suddenly disappeared, Paul was told that her mother checked her out of Fairview, leading to confusion as Sheila Carter had died five years prior.

When a fire breaks out in the tower, panic ensues and Jack later informs Paul that he and Phyllis encountered Patty, leading to a search for her, but when her body is not found, she is presumed dead.

However, Patty is soon shown to be alive in the remains of the building, encountering evil mastermind and the person behind the fire, Ian Ward, who tells her to come on the run with him.

Several months later, Paul is informed that Patty was found by police living on the street after Ian abandoned her.

Patty deduces that Sharon was in fact never pregnant and the child is actually that of Sharon's ex-husband Nick; Dr. Anderson had arranged for the boy to be stolen from Genoa City Memorial Hospital and have a nurse tell Nicholas and his wife Sage Warner that their son died.

Dr. Anderson is then revealed to in fact be Sandra Allen, a woman who once suffered an injury at a party thrown by Nicholas at the Newman ranch when they were younger and she stole his child as revenge.

Patty, however, ends up stabbing and killing Dr. Anderson with a letter opener in self-defense when she comes after her, but the incident ultimately sends her into a catatonic state and she is unable to reveal any of the information she knows to Paul, Sharon, Dylan, Nick or Sage.

Sharon, however, manages to steal the cell phone Patty was using so that she would not be able to contact her or anyone else further, hoping that would put an end to the threats.