BlacKkKlansman was one of six titles to earn more than £1m at the UK box office at the weekend, the others being chart-topper Christopher Robin, Mamma Mia!
The upmarket drama went out on a relatively tight 148 prints, yielding box office of £508,000 plus £10,000 in previews.
His previous film in UK cinemas, Chi-Raq, grossed £59,500 over the course of its entire theatrical run.
Look for BlacKkKlansman to expand this Friday as its distributor Universal pushes the film into a broader swathe of multiplexes.