The Hills actress Audrina Patridge was spotted having lunch this week with a hunky mystery man. Life & Style can reveal him as Derek White, a model and creator of LiftKits, a foot insert that increases height.

Audrina and the model dined out at Breadbar in Beverly Hills on Wednesday. An insider tells Life & Style, "Derek is an old friend. They had lunch and caught up."

Photo Credit: Startraks; R/R