Lindsay Lohan -- My Chateau Marmont Ban Is OVER!

Lindsay Lohan is OFF THE CHATEAU MARMONT BLACKLIST -- which explains why she was there Thursday night -- and TMZ has learned it's all thanks to a Hail Mary phone call to the owner himself.

As TMZ first reported, LiLo was BARRED from the legendary hotel after she didn't pay her massive $46,000 bill -- which she racked up buying cigarettes, mini-bar goodies and candles. Lindsay claimed she thought the production co. behind "Liz and Dick" -- which she was filming at the time of the charges -- was footing the tab.

Sources close to Lilo tell TMZ ... the actress reached out to hotel magnate Andre Balazs -- owner of the Chateau along with a slew of other properties -- in hopes to reclaim her stomping grounds.

We're told LiLo and Andre have been friends for years and she made it clear that the whole ordeal was a giant misunderstanding. Lilo offered to pay off the debt (which we're told she did) if Andre could have a chat with the Chateau staff.

Our sources tell us, Andre informed LiLo he had no idea she had been blacklisted and promised to remedy the situation ASAP.

Which clearly happened.