Disney made a real gem of a movie in “Darby O’Gill”. Sean Connery in one of, if not his first role. He also sings in it and is not bad at all.
Now that I think of it, he sings in “Dr. No” too.
He famously had a fight on set with Lana Turner's boyfriend, Johnny Stampanato - a two-bit gangster and convert to Islam who was later stabbed to death by Turner's lesbian daughter.
You ain’t lived until you’ve seen Sean sing “Underneath the Mango Tree.”