Brian Steinberg Senior TV Editor This isn’t a red-carpet film debut or a charity event, but celebrities are still turning out for it. When the Israeli mobile-games company Playtika launches a new series of ad campaigns on the day after Christmas, it will do so with some famous names in tow. Jason Alexander will pitch World Series of Poker in a series of commercials, and Sarah Jessica Parker will play a city girl who gets to enjoy the country life thanks to Solitaire Grand Harvest.