Yes when I was a kid in 1965. My parents and me with my aunt and uncle and 3 cousins all went to see it in the theater. Saw it several times again within the next ten years.
@Unefilletrescurieuse yes it had a huge following. I saw it in the now closed Uptown Theater in Washington DC. Big curved cinema screen. The same theater ran 2001 a Space Odyssey for around 2 years straight.
Notice the costume changes on Maria's outing with the children. She stayed up all night to make them playclothes which they changed in and out of while roaming about town. She doesn't appear the slightest bit sleepy.