Sarah Michelle Gellar has some advice for first-time Comic-Con panelists: “I always say to actresses, if you haven’t been — this is going to sound really funny — but get a mask and take a look around. I’m serious,†she tells THR. “You get rushed into your panel and you come out of the backside, and you never actually see the main hall. It’s pretty amazing.†The Buffy star, who will be at Comic-Con again this year promoting Ringer, admits that she “possibly†donned a costume and went incognito herself. If Gellar does cosplay as Willow, the whole Internet could melt. [THR]