Tonight at the London Palladium is a British television variety show that is hosted from the London Palladium theatre in the West End. Originally produced by ATV for the ITV network from 1955 to 1969, it went by its original name Sunday Night at the London Palladium from 25 September 1955 until the name was changed to The London Palladium Show from 1966 to 2 February 1969.

It underwent three revivals, first from 28 October 1973 to 28 October 1974 where it retained its Sunday Night at the London Palladium title, second in 2000 under the title Tonight at the London Palladium, and third from 2014 until 2015 under the title Sunday Night at the Palladium, dropping London. From 2016, the show is called Tonight at the London Palladium and is presented by Bradley Walsh.

A one-off Sunday Night at the London Palladium was screened to mark Bruce Forsyth's 70th birthday in February 1998.

The regular hosts of the show were Tommy Trinder (1955–1958), Bruce Forsyth (1958–1960 and 1961–1964), Don Arrol (1960–1961), Norman Vaughan (1962–1965, 1974), Jimmy Tarbuck (1965–1967), Jim Dale (1973–1974) and Ted Rogers (1974). Other guest comperes were: Hughie Green, Alfred Marks, Robert Morley, Arthur Haynes, Dickie Henderson, Dave Allen, Des O'Connor, Bob Monkhouse and Roger Moore.

The first ever show was compered by Tommy Trinder with Gracie Fields and Guy Mitchell being the night's big guests. The programme was one of ITV's most watched, reaching its biggest audience in January 1960 while Bruce Forsyth was the host, in an edition featuring Cliff Richard and the Shadows, watched by more than 20 million people.

However, according to the book Television's Greatest Hits written and researched by Paul Gambaccini and Rod Taylor the biggest viewing audience was 9.7 million in 1964 (although this would have been homes, rather than viewers, as this was the way British television viewing figures were recorded at the time). This was on Sunday 19 April when Bruce Forsyth introduced the Bachelors, Hope and Keen and Frank Ifield with the Pamela Devis Dancers.

After the Tiller Girls and the lesser acts in the first part was a game show imported from America, Beat the Clock, the format of which was rather like Bruce Forsyth's later hit in The Generation Game. It featured couples having to perform a trick or stunt, like even changing clothes (previously put on, on top of their ordinary clothes) with each other within a set time. If a couple could complete both stunts, the wife must rearrange words stuck to a magnetic board and people had to "arrange them into a well known phrase or saying" in 30 seconds. If she succeeded, the couple won a major prize. Whenever a bell rang, the couple who played at that time would play a jackpot stunt for a cash bonus worth £100 for each week since the last jackpot win.

The second part of the show was where the big stars shone. It featured many top people over the years including Bill Haley rocking around the clock, Chubby Checker who introduced the "new dance" the Twist to the country with a whole stage full of people dancing the Twist and Sammy Davis, Jr. met the Tiller Girls in 1961. Other star guests included: Judy Garland, Bob Hope, Johnnie Ray, Liberace, Petula Clark, the Seekers, the Beatles and the Rolling Stones. Italian mouse puppet Topo Gigio came back a number of times.

The Beatles' publicist Tony Barrow said that after the band's first appearance on the show on 13 October 1963, Beatlemania took off in the UK.

The show always ended using the huge revolving stage where the Tiller Girls, the compere and that night's guests stood on it as it slowly turned around to the familiar end tune of the show.

A famous episode took place in 1961 during a strike by the British acting union Equity, who refused to allow its performers to appear that week. Exempt from this, Bruce Forsyth and comedian Norman Wisdom performed the entire show themselves.

In 1967, the head of ATV, Lew Grade, axed the show. The reasons for this remain obscure, but Grade later said that axing the series was a mistake.^{[citation needed]}

Very few episodes survive of the earliest versions of this series, including the 1973–1974 revival, though surviving episodes of Sunday Night at the London Palladium were repeated by Talking Pictures TV in 2020^[12] and 2021.^[13][14] (For a general overview of the potential reasons for this, see Wiping.)