Fallen AFL star Ben Cousins has been arrested again in Perth, according to Nine News Perth.

Cousins is reportedly in police custody after allegedly being found with 2.5 grams of methamphetamine.

The Brownlow medallist was allegedly driving erratically in in Victoria Park before being arrested and taken to Kensington Police Station.

He is set to face court on Thursday.

“Ben Cousins is right now in a holding cell here at the Perth watchhouse,” Nine reporter Jerrie Demasi said.

“He was arrested, found sleeping, next to his car after reports of erratic driving.

“Police tell me a body search found 2.5 grams of methamphetamine.”

Cousins appeared in a tell-all interview with Channel 7 just three weeks ago.