Kim Kardashian's Lawyer -- The Marriage Was Real

Kim Kardashian's marriage was absolutely, positively the real deal ... this according to her divorce lawyer.

Disso Queen Laura Wasser, who reps oodles of celebs, not only filed divorce docs on Kim's behalf, she negotiated her prenup. Wasser tells TMZ, "Our office did indeed negotiate and prepare a prenup for Ms. Kardashian. Given what I know regarding that document, it is not plausible that this marriage was a sham."

Wasser -- who is notorious for not speaking publicly about her cases -- tells us the negotiations were "prolonged" and dealt with financial issues "that go well into the future" -- markers that would not be present if someone intended a short marriage from the get go.

Sources connected with Kim tell us ... the prenup covered Kim's long-range career plans ... as one source put it, "Why on earth would they [Kim, Kris and their lawyers] create a document which looks far into the future if they planned a marriage that would only last a few months."

And the same sources tell us the prenup was exhaustive -- 30 pages, including exhibits, tax returns and other financial documents.

As we previously reported, there was a lot of bickering between Kim, Kris and the lawyers during the prenup negotiations -- something that is not a marker of a phony marriage.