HERE COMES TYLER-CLAUS

Here’s the oddest casting of the week: Skinny, sunken-cheeked Aerosmith rocker Steven Tyler as Santa Claus! He’ll portray St. Nick in the Saturday morning kids show “Lizzie McGuire.” Hilary Duff, the 14-year-old star of the show, spotted Steven at a party and introduced herself as a huge Aerosmith fan. The singer — whose kids watch her show — returned the compliments. Hilary’s mom Susan told this column: “We were looking for someone to play Santa in a Christmas episode, so we begged Steven.” Rosie O’Donnell, Clint Eastwood and Dustin Hoffman had turned down the role, “but Steven finally said, ‘Stop begging! I’ll do it!'” (Can I have a chorus of “Jingle Bell Rock”?)