Live SB XLV chat: Steelers-Packers

Two of the most storied franchises in the NFL -- the Pittsburgh Steelers and the Green Bay Packers -- square off today for Super Bowl XLV at Cowboys Stadium.

The ESPN Dallas crew will be on hand live from Arlington, Texas beginning at 4:30 p.m. CT, as will several of ESPN's NFL experts and analysts.

Countdown Live: Super Bowl XLV