The leather accessory was a gift from his dad Eamon Farrell, a former soccer star who played for Ireland's Shamrock Rovers Football Club.
It is said to have been stolen a few weeks ago and the Minority Report star is desperate to get it back, according to Britain's The Sun.
A source tells the newspaper, ""Colin has had this lucky leather belt for so long he just can't bear to get rid of it. The thing is literally coming apart at the seams.
""The belt has undergone numerous alterations, like having extra holes punched in it and extra leather added since he has gone through so many weight changes.""