Gu Kailai (born 15 November 1958) is a Chinese former lawyer and businesswoman. She is the second wife of former Politburo member Bo Xilai, one of China's most influential politicians until he was stripped of his offices in 2012. In August 2012, Gu was convicted of murdering British businessman Neil Heywood and was given a suspended death sentence, later commuted to life imprisonment in December 2015.

Gu is the youngest of five daughters of General Gu Jingsheng, a prominent revolutionary in the years before the Chinese Communist Party took power. Gu's mother, Fan Chengxiu, was a descendant of the renowned Song dynasty chancellor and poet Fan Zhongyan. General Gu held various government positions during early Communist rule but was imprisoned during the Cultural Revolution. Gu Kailai herself was also punished, being forced to work in a butcher shop and a textile factory.

After the gaokao was reinstated, Gu entered Peking University, from which she graduated with an LLB degree in law and then a master's degree in international relations.

In 1988, Gu founded the Kailai Law Firm in Dalian, and subsequently established herself as a prominent lawyer in the city. In 1995, she relocated the firm's headquarters to Beijing and in 2001 changed its name to Angdao. In the course of her career, she was involved in several high-profile cases, and is suggested to have been the first Chinese lawyer to win a civil suit in the United States, where she represented several Dalian-area companies involved in a dispute in Mobile, Alabama. In 1998, she published a book, Uphold Justice in America, about her lawsuit in the US and her views of the U.S. justice system, which she deemed inept: "They can level charges against dogs and a court can even convict a husband of raping his wife," she wrote in the book. "We don't play with words and we adhere to the principle of 'based on facts,'...You will be arrested, sentenced and executed as long as we determine that you killed someone."

In March 2012, Gu became embroiled in a national scandal after her husband's deputy, Wang Lijun, sought refuge at the U.S. consulate in Chengdu. It was rumored that Wang presented evidence of a corruption scandal, whereby Bo sought to impede a corruption investigation against Gu. Specifically, Wang stated that Gu had been involved in the murder of Neil Heywood after a business dispute. Following the Wang Lijun incident and Bo's removal from key Communist Party posts, Gu was placed under investigation for Heywood's death. On 10 April 2012, Gu was detained and "transferred to the judicial authorities" as part of the investigation.

On 26 July 2012, Gu was formally charged with murdering Heywood, based on what the prosecutor claimed was "irrefutable and substantial" evidence. On 9 August 2012, Gu admitted during a one-day trial that she was responsible for Heywood's murder. She claimed that her actions were due to a "mental breakdown" after her son had been threatened by Heywood, and stated that she would "accept and calmly face any sentence".

On 20 August 2012, Gu received a suspended death sentence, which is normally commuted to a life sentence after two years, but she could be released on medical parole after serving nine years in prison. The trial lasted one day, and Gu did not contest her charges. Zhang Xiaojun, a Bo family aide, was sentenced to 9 years in jail for his involvement in the murder following his confession.

After the media published footage of the trial, claims that the woman shown in court was not in fact Gu, but a body double, quickly became popular on the Chinese Internet. Experts held differing opinions on the matter: the Financial Times cited the conclusion of "security experts familiar with facial recognition software" that the person who stood trial was not Gu, whereas a facial recognition expert contacted by Slate was of the opinion that the woman most likely was Gu. The practice of rich people paying others to stand trial and receive punishment in their place, called ding zui, is relatively widespread in China.