A tale I heard
Actor Hank Azaria on his character David originally being planned to be the one to marry Phoebe in Friends, and Mike (Paul Rudd):
"The plan always was kind of to bring him back. What happened was Paul Rudd is so awesome that they sort of found a groove with him and David became more of just the grist for that mill. As opposed to the other way around.
"It actually did sting a little bit. Whatever part of me is David the Science Guy who went to Minsk, which admittedly is probably a small part of me, but that part of me wanted to end up with Phoebe. So I was sort of sad when I didn’t."