Former "90210" star Vanessa Marcil is officially a free woman ... because her divorce from "CSI:NY" actor Carmine Giovinazzo (aka the nicest DUI arrestee of all time) has been finalized.

TMZ broke the story ... Marcil filed for divorce from Giovinazzo last summer, citing "irreconcilable differences." They were married in 2010 and have no children together.

As for the division of assets ... Vanessa gets the 2009 Chevy Silverado, their L.A. property, a bunch of bank accounts ... as well as all rights to her baby clothes company called Baby Gagoo.

Carmine gets the mother lode -- a 2002 Mercedes CLK, his 2006 Harley, his 2010 Triumph motorcycle, the 1969 Pontiac GTO, 2009 Ducati, 2011 Chevy Camaro ... plus a bunch of bank accounts and other boring stuff.

It's been a rough couple months for Carmine, who was arrested for DUI in January in Scottsdale, AZ. You'll recall, AZ cops say the actor was one of the nicest people they've ever arrested, apologizing constantly and saying he didn't want to be an "a**hole." He even thanked the arresting officers profusely for being so nice to him.


According to police, Carmine's blood alcohol level registered at .149 after his arrest ... nearly twice the legal limit in AZ.

He has since been ordered to complete an alcohol program ... but hey, at least the divorce is behind him.

"CSI: NY" star Carmine Giovinazzo -- who plays Det. Danny Messer on the show -- has pled guilty in his Arizona DUI case -- but chances are he won't spend a single day behind bars ... TMZ has learned. 

We broke the story ... Carmine was arrested in Scottsdale on Jan. 21 at 2:40 AM after cops say he was drunkenly swerving all over the road in a Jeep Wrangler.

Now, we've learned ... the 39-year-old actor struck a deal with prosecutors in which he agreed to enter a guilty plea ... and in exchange he was ordered to complete an alcohol training program by May 3.

There is one catch -- if Carmine fails to complete the program by the deadline, he'll have to spend 10 days in jail ... but c'mon, who would possibly screw up that deal???

Stay tuned ...

Carmine Giovinazzo -- who plays Detective Danny Messer on "CSI: NY" -- was busted for DUI in Scottsdale, AZ last week ... and cops say he couldn't have been a nicer guy during the arrest.

According to the police report, obtained by TMZ, cops located 39-year-old Carmine swerving all over all the road around 2:40 AM on Monday January 21.

When cops approached the vehicle, Carmine was reportedly "immediately apologetic and told [officers] he had been driving erratic because he was lost and using the GPS."

According to the report, Carmine -- who had two passengers in the white Jeep Wrangler he was driving -- explained he was not from AZ.

Cops say Carmine stank of booze, had bloodshot eyes and was slurring his speech. When asked if he had been drinking, cops say the actor fessed up to having scotch at the W Hotel.

Carmine was eventually arrested for DUI. The arresting officer says Carmine "repeatedly apologized to me and told me he didn't want to be an 'a**hole.'"

The cop added, "[Carmine] thanked me many times for not treating him like a criminal and showing him respect."

Cops say Carmine's blood alcohol level registered at .149 -- almost twice the legal limit in AZ.

We reached out to Carmine for comment -- so far, no word back.