Insiders say Lindsay Lohan is behaving like a diva on the set of "Liz & Dick" and not getting along with her co-star, Grant Bowler, The Daily reported Sunday.

Beyond her well-documented rear-ending of a truck on the way to work on June 8 and needing paramedics last week because she fell unconscious, Lohan often shows up two hours late to work and "rarely knows her lines," one source said.

"The crew is fed up with Lindsay because they have to spend so much time dealing with her diva antics and, in turn, trying to soothe Grant's battered ego," a source told Star magazine.

Bowler was hired to portray Richard Burton at the eleventh hour, just before filming started this month, because Lohan was demanding that cable network Lifetime bring in a big-name leading man like Gerard Butler, Robert Downey Jr. or even Brad Pitt.

"She was delusional," said one insider. "This is a made-for-TV movie. There's no budget for a big star."

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Lohan, biased against Bowler from the beginning, has "been so mean to Grant that her comeback is in jeopardy," Star reported.

Lohan has looked glamorous in dozens of different '60s period costumes from "Liz & Dick," but "the footage so far has been just awful," due to the obvious lack of chemistry between the stars, said one source.

The actress' publicist, Steve Honig, told Flash, "Lindsay and the cast and crew have become a tight-knit family and are collaborating on what will be an amazing film."