Tracey Ullman (born Trace Ullman; 30 December 1959) is a British-American actress, singer, dancer, screenwriter, producer, director, and author. Despite being frequently referred to as a comedian, Ullman considers herself a character actress. Critics have lauded her ability to shift seamlessly in and out of character and accents, with many dubbing her the "female Peter Sellers".

Ullman began her career as a dramatic actress on stage, as well as in the British soap opera Mackenzie, playing Lisa Mackenzie. After an award-winning performance in the improvised play Four in a Million at the Royal Court Theatre, she branched out into comedy. She starred in the British television sketch comedies A Kick Up the Eighties (with Rik Mayall and Miriam Margolyes) and Three of a Kind (with Lenny Henry and David Copperfield), the latter winning her a BAFTA in 1984. After a brief singing career (which garnered three top-ten singles), she appeared as Candice Valentine in Girls on Top with Dawn French and Jennifer Saunders.

Ullman emigrated from the United Kingdom to the United States. She would go on to star in her own network television comedy series, The Tracey Ullman Show, from 1987 to 1990, which also featured the first appearances of the long-running animated media franchise The Simpsons. She later produced programmes for HBO, including Tracey Takes On... (1996–99) garnering numerous awards. She has appeared in several feature films, including Plenty (1985) which earned her a BAFTA Award for Best Supporting Actress nomination.

In 2016, she returned to British television with the BBC sketch comedy show Tracey Ullman's Show, her first project for the broadcaster in over 30 years. This led to the creation of the topical comedy series Tracey Breaks the News in 2017.

In 2017, Ullman was reportedly Britain's richest comedian and the second-richest British actress, with an estimated wealth of £80 million. She is the recipient of numerous accolades, including twelve American Comedy Awards, seven Primetime Emmy Awards, two British Academy Film Awards, four Satellite Awards, a Golden Globe Award, and a Screen Actors Guild Award.

Tracey Ullman was born in Slough, Buckinghamshire (now Berkshire), the younger of two daughters, to Doreen (née Cleaver; 1929–2015), who was of British and Roma extraction, and Anthony John Ullman (1917–1966), a Roman Catholic Pole. Anthony served in the Polish Army and took part in the Battle of Dunkirk during World War II. After emigrating and marrying in England, he worked as a solicitor, a furniture salesman, and a travel agent. He also brokered marriages and translated among the émigré Polish community.

When she was aged six, Ullman's father, who had been recovering from a heart operation, died of a heart attack in front of her. She was subsequently uprooted to Hackbridge, southwest London. Her mother struggled to make ends meet without their father's income. In an effort to cheer her family up, Ullman, along with her sister Patti, created and performed nightly shows on their mother's bedroom windowsill. After their mother remarried, the family began moving around the country, with Ullman attending numerous state schools, where she wrote and performed in school plays.

She eventually caught the attention of a headmaster who recommended that she attend a performing arts school. She won a full scholarship to the Italia Conti Academy at the age of twelve. At sixteen, she attended a dance audition under the impression that she was applying for summer season in Scarborough. The audition resulted in a contract with a German ballet company for a revival of Gigi in Berlin. Upon returning to England, she joined the Second Generation dance troupe, performing in London, Blackpool, and Liverpool. She branched out into musical theatre and was cast in numerous West End musicals including Grease, Elvis The Musical, and The Rocky Horror Show.