Will 2 male cockatiels live peacefully in the same cage?

I hope you have a large cage. Cockatoos need a lot of room. Will the budgies have clipped wings? Fluttering about can be annoying to some larger birds. It has been my experience that all birds can get along, but it is dependent on personalities. Please don't put smaller birds in with larger birds until you are certain they like each other. Some birds won't tolerate any other birds, period.