There's no doubt people change when they've had a few.
For the first time psychologists have identified the four characters people transform in to when they've had too many beers.
The study, published in academic journal Addiction Research and Theory, asked 364 women and men to fill out a personality test in two ways: once considering themselves normal, and again as they are when they're drunk.
From this information, experts at the University of Missouri-Columbia considered five personality factors that are affected by alcohol - Extroversion, Agreeableness, Conscientiousness, Intellect and Emotional Stability.
They split the respondents in to four different types of drunk people: the Hemingway, the Nutty Professor, the Mary Poppins and the Mr Hyde.