When did the beatles start doing movies?

The Beatles made two movies, A Hard Day's Night in 1964 and Help! in 1965, both starring well known English actors, and neither of which were award-winning cinematic classics, but pleasantly enjoyable comedies as vehicles to further promote them, and to feature their latest songs.

At about this time, there was also a series of short TV Cartoons featuring the adventures of the animated Beatles and their music.

In a period of self-indulgence, they produced Magical Mystery Tour in 1967, a fairly lack-lustre TV-movie about a "magical" Mystery Tour, again featuring a variety of well-known English actors, and songs from their EP of the same name.

In 1968, the same people who produced the Beatles TV cartoons made Yellow Submarine, a feature-length movie of the animated Beatles liberating Pepperland from the evil clutches of the "Blue Meanies", and including orchestral pieces from George Martin.

In 1969, the Beatles planned to make a television special, about the making of their next album, from first rehearsal of the songs to performing them for an audience. The project was ill-fated, and the "audience" ended up being their staff, as they played on the roof of Apple Corps, and the passers-by on the street below, until local police arrived to shut down the show. The footage was edited as a movie, and released to theaters as Let It Be.