Charmed star Rose McGowan has spoken out for the first time about her new boyfriend Robert Rodriguez - branding him her "best friend". The actress fell for the director on the set of this year's (07) Planet Terror, but insists the attraction was borne from them being great pals at the start. She says, "He's my best friend. We instantly became really good friends." The couple had previously denied speculation they had become romantically involved on the Planet Terror set.