The Transformers star admits he struggled to bond with Inception actor Hardy while shooting the upcoming Depression-era crime drama and tensions came to a head one day when they became embroiled in a backstage brawl.
LaBeouf claims the tussle was a one-off and Hardy "never did that roughhouse stuff with me again".
But that wasn't the only issue LaBeouf had with his co-star - he despised hearing Hardy and their fellow colleague Jason Clarke boast about their expensive sports cars.
LaBeouf, who frequently banks $15 million (£9.4 million) pay cheques for his roles in box office blockbusters, like Michael Bay's Transformers and Indiana Jones & the Kingdom of the Crystal Skull, insists he has "no interest" in spending his money on expensive toys and gadgets and claims he feels "real shame" over his growing wealth.
So he found himself gritting his teeth as Hardy and Clarke chatted about their pricey rides.
In a candid interview with Details magazine, he says, "At this point I have enough money to live 25 lifetimes. You couldn't spend the money I've accrued now. (But) I have no interest in the materialistic bulls**t money can buy.
"They're talking about Ferraris and s**t, like it's a cool car. If Clarke pulled up in a Ferrari right now, my idea wouldn't be, 'What a cool f**king guy!' It would be, 'Look at this clown.' I think the fact that I despise that stuff keeps me safe. I hang on to my dirt. I like my dirt."
Painfully estranged from his daughter old-school boxing trainer Frankie Dunn (Clint Eastwood) hasn't let anyone get too close to him in a very long time. Even his best friend and former trainee Scrap (Morgan Freeman) who manages Frankie's rundown boxing gym has a tough time getting through. Everything changes however when Maggie Fitzgerald (Hilary Swank) walks into the gym. A spitfire looking for someone to believe in her Maggie also has a painful past. But with unshakable willpower along with some tremendous raw talent Maggie has found that her love for boxing could be her ticket to a happy life--and she wants Frankie to turn her into a champion. Naturally he doesn't want to have anything to do with her and doesn't want to take that risk especially with a girl.Yet Frankie is soon won over by the young boxer's dogged resolve to be the best. The road to glory isn't easily paved for these two stubborn mules but Maggie and Frankie rediscover a sense of family they both thought they'd lost long ago. Theirs is a bond that will carry them through one of the hardest journeys either one of them will ever take. Oh yeah you're going to need a wad of tissues for this one.
Swank once again sheds her girlishness to tackle the roughhouse world of female boxing and she delivers another Oscar-caliber performance as Maggie. Not only does the actress embody the physicality of such a role--achieved after months of hard training--she also captures the spirit of a woman who defies the odds by breaking away from her dirt-poor trailer-trash upbringing to become a champion. Some may liken the plain no-nonsense Maggie to Swank's Oscar-winning role as the girl-turned-boy Brandon in Boys Don't Cry but Swank has matured in her acting abilities giving Maggie a very definite feminine edge. Still Swank might consider a nice romantic comedy for her next project. As for the men of Baby Eastwood and Freeman have never been more on top of their game. Frankie is tailored-made for Eastwood who plays a man tortured by his past and reluctant to let anyone in. It's a persona he has adopted many times but as the boxing trainer the craggy face gravel-voiced actor-director truly gives one of the better performances of his career. The same goes for Freeman as the soft-spoken but oh-so-wise Scrap. And watching the two Unforgiven veterans bicker and banter in Baby is like watching an old married couple.
Like a fine wine Clint Eastwood's movies just keep getting better and better the older the director gets. Following last year's intense Mystic River which some saw as a bit heavy handed Eastwood seems to have gone back to a quieter simpler more personal tone with Million Dollar Baby. The film starts out along the lines of such great boxing films as Raging Bull and the recent Girlfight as it highlights the competitive world of female boxing. It's in your face and gritty showing the punches the blood and the pain in glorious Technicolor. But just as it starts to turn into Rocky-style sap when Maggie rises to the top against all the odds the film subtly shifts into a love story about two people hurt by their pasts only to find each other and decide to hold on in a deeply familial way. Then just when you think how sweet that all is Baby throws you for an even bigger albeit darker loop. Eastwood expertly and gently guides you through the film's wondrous maze of revelations. Baby could very well creep in as a surprise Oscar contender.