Robin Thicke and his wife made a BLOODY FORTUNE in 2009 and 2010 ... problem is, they forgot to share the love with the federal government ... and now Uncle Sam has issued a lien on their property.
According to official documents filed in L.A. ... Thicke and his super-hot actress wife Paula Patton owe the government $492,583.49 for failing to pay income taxes two years in a row.
Patton isn't just a pretty face ... she received critical acclaim for her role in 2009's "Precious" and co-starred with Tom Cruise in the 2011 flick "Mission Impossible: Ghost Protocol."
But a rep for the Thicke family tells TMZ ... the couple is aggressively trying to fix the problem ... telling us, "They've already paid more than half of this and they're working with the IRS to pay the rest."