"Transformers" star Shia LaBeouf was arrested in the early hours of Sunday after refusing to leave a Chicago shop.

Security staff at Walgreens drug store called police after repeatedly asking the 21-year-old actor to leave the store because he appeared to be drunk.

LaBeouf was taken into custody at around 2.30am and charged with trespassing.

Police spokeswoman Laura Kubiak said the young star was "very courteous and polite". He was not breathalyzed as he had not been driving and was released on bail before 7am.

LaBeouf must now appear at Cook County court on a misdemeanor charge on November 28. He is yet to comment on the incident.

The actor has just finished shooting "Indiana Jones and the Kingdom of the Crystal Skull" with Harrison Ford and Cate Blanchett. The movie is due to be released next year.

LaBeouf is also set to reprise his role as heroic Sam Witwicky in the "Transformers" sequel.

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