It's not something I can imagine I would say myself, but both seem all right to me. It's always a little difficult to be 100 percent sure without a specific context, though. Just remember that it's "come true", not "come ture". UPDATE: I want to add that “come true” means “to happen in a way that is hoped for, dreamed of or predicted.” So if you didn’t hope for/dream/predict that something would happen, then it makes no sense to use “come true”.