To Sir, with Love is a 1967 British drama film that deals with social and racial issues in a secondary school in the East End of London. It stars Sidney Poitier and features Christian Roberts, Judy Geeson, Suzy Kendall, Patricia Routledge and singer Lulu making her film debut. James Clavell directed from his own screenplay, which was based on E. R. Braithwaite's 1959 autobiographical novel of the same title.

The film's title song "To Sir with Love", sung by Lulu, peaked at the top of the Billboard Hot 100 chart for five weeks in the autumn of 1967 and ultimately was the best-selling single in the US that year; meanwhile, Poitier, playing a charismatic schoolteacher to troubled youth, was the first black actor to win a Golden Globe Award. The film ranked number 27 on Entertainment Weekly's list of the 50 Best High School Movies.

The film premiered and became a hit one month before another film about troubled schools, Up the Down Staircase, appeared. A made-for-television sequel, To Sir, with Love II, was released in 1996, with Poitier reprising his starring role.