It's the day Robin Thicke has dreaded.  And the reason why he preemptively sued the estate of the late Marvin Gaye.  Gaye's family has now publicly stated they believe 'Blurred Lines' unlawfully samples from one of the legend's biggest hits.

Speaking on behalf of his family Marvin Gaye III said told TMZ.com that they're disappointed in Thicke, and how he chose to go about protecting the millions of dollars in royalties he stands to inherit from 'Blurred Lines'.

"If you listen to the music, I'm sure anyone will see the similarities clearly between what my father does and what Robin Thicke has been trying to do," he continued. "What would he want to be protected from if he didn't do anything?"

As to whether the family will be suing, Gaye III responded, "What do you think? My counsel is right now in the process of taking care of business, and like I said, once again I'm here to uphold my father's legacy."

"We're all fans of Robin Thicke's, as well as he's a fan of my father's," Gaye III said. "Our point is that there's a way to do business and a way not to do business. We're not happy with the way he went about doing the business, let alone suing us over something where he clearly got his inspiration from at the least."

Earlier this month, 36-year-old Thicke and "Blurred Lines" contributors, T.I. and Pharrell Williams, filed a suit against the estate of Marvin Gaye and Bridgeport Music, after  comparisons were made between "Blurred Lines" and Marvin Gaye's '70s song "Got to Give It Up".