‘Hunger Games’ Star Jennifer Lawrence — 911 Emergency on My Front Lawn

Exclusive Details0626_jennifer_lawrence_x172Frightening moment for “Hunger Games” star Jennifer Lawrence yesterday — when an underage girl collapsed on the front lawn of her L.A. apartment complex.

The Santa Monica Police Department tells our sources … Lawrence was out walking her dog … when she noticed a random girl laid out on her back.

As Jennifer rushed to assist the young woman, someone in the area called 911 … and paramedics raced to the scene.

Cops tell us … “The young lady who collapsed was a juvenile and was part of a group that was together.” 

It”s unclear why the young woman was in front of Jennifer”s home … but cops say, “Alcohol may have played a role in the incident.”

We”re told paramedics didn”t feel the girl needed to be transported to a hospital — instead, she was treated on the scene and cleared to leave.

So far, no word back from Lawrence”s camp.