Her son Ryder, who'll be 10 in January, has apparently been giving his mom a bit of grief about it.
"I think he looks forward to more the party than actually the idea of us getting married," the actress, 34, says in an interview airing Tuesday on The Ellen DeGeneres Show. "He seems to, like, have it really planned out what he's wearing."
And it sounds like it will be quite the outfit.
"He apparently he wants to wear a neon-green tux," Hudson reveals. "He loves neon green. He wants to wear neon green with black. That's pretty cool. He's a bit of a fashion boy."