The actor wed Phyllis Fierro in April, 1987 and he's planning a big bash to celebrate the anniversary next year (12) - but he also wants to give others the chance to see how it's possible to make a Hollywood marriage work.
He tells Life & Style magazine, "We're talking about renewing our vows. That would be really nice. We have a lot to celebrate; we've been through so much. We've earned it."
And Macchio insists the couple's secret is simple: "Commitment... Believing that you're meant to be together and knowing at the end of the day that this is the person I should be with."
His solid marriage will form the basis of a new tell-all - inspired by the success of pal Rob Lowe's new biography.
The actor explains, "I think it's time to tell my story. I don't have a crazy background, but I have some things to tell.
"(Lowe's book was) definitely interesting."