On August 16, 1962, Ringo Starr replaced Pete Best as the Beatles' drummer. From the article:
"The Day the Beatles Fired Pete Best
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Arguably the most ignominious firing in rock history happened on Aug. 16, 1962. Shortly before recording their debut single, the Beatles dismissed drummer Pete Best.
Two months earlier, the group passed an audition for Parlophone Records. But while producer George Martin liked what he heard, he was dissatisfied with Best. He told the Beatles that, while they could use Best onstage, he was going to bring in a session drummer for the recordings. The other Beatles, along with manager Brian Epstein, discussed the situation and decided that it was in their best interests to sack the drummer entirely. On Aug. 16, Epstein called Best into his office and told him the news that he was out.
Known around Liverpool as "mean, moody and magnificent," Best had joined the Beatles almost exactly two years earlier when they needed a drummer for their upcoming residency in Hamburg, Germany. His audition was only a few days before they made the trip. But his sullen personality never fit in well with the wisecracking Beatles, even refusing to adopt the soon-to-be-famous "Beatles haircut."
Best was the most popular Beatle with their female fan base and long maintained that he was fired because they were jealous of his looks. But when five songs from the Beatles' Decca audition were officially released on the 1995 Anthology set, it proved that Best's drumming -- both in terms of his timekeeping and inventiveness -- was inferior to his replacement's. Ringo Starr, a friend of theirs who had been in Rory Storm and the Hurricanes, was immediately hired as his replacement and made his debut with the group two days later."