Columbia Pictures

Drew Barrymore: Hollywood star and budding crimefighter.

The actress was cruising the mean streets of West Hollywood Monday morning when her car was tagged by another vehicle.

The rear-ended Barrymore was not injured, says West Hollywood Sheriff's Lt. Lajana Haselrig, but the actress seemingly took offense when the other motorist sped from the scene without exchanging insurance information...or even asking for an autograph.

Our hero apparently took off after the hit-and-runner, tailing the baddie long enough to jot down his license plate number.

The offending motorist remains at large, says Haselrig, who wouldn't confirm that Barrymore gave chase.

But the officer acknowledges that someone (wink-wink) did provide the digits: "We have a plate and it is currently under investigation."

All in a day's work for one of Charlie's Angels.