Police are searching for two men who assaulted a woman while trying to steal her car in North Perth.

The 38 year-old woman was confronted by the men soon after pulling into the driveway of her home on Vincent Street late last night.

They demanded the keys to her convertible before punching her twice in the face and running away when a housemate intervened.

The men are described as dark-skinned males in their 20s.