By Debbie Emery - Breaking Celebrity News Reporter

Method actor Matthew McConaughey has immersed himself so much into the role of an AIDS victim by undergoing an extreme diet that could lead to serious health problems in his real life, Breaking Celebrity News is exclusively reporting.

The formerly toned six foot Texan, who has swapped his bulging muscles and sizzling six pack for sickly skin and bones since reportedly losing 30 pounds to star in the upcoming movie The Dallas Buyer's Club, appeared weak and frail in a baggy cardigan that fell off his thin frame as he walked supported by his mother on Sunday.

Such an extreme weight loss, "means he went into muscle wasting, which is why he is terribly gaunt," nutritionist Majid Ali, who has not treated the star, told Breaking Celebrity News in an exclusive interview.

The 42-year-old expectant father's startling transformation was made to play real-life AIDS victim Ron Woodruff, a heterosexual homophobe who contracted H