Matthew McConaughey took a midday stroll through NYC yesterday with pregnant Camila Alves, kids Levi and Vida, and their new pup. The family of four are spending time on the East Coast while Matthew prepares to share the big screen with Leonardo DiCaprio. The Hollywood heartthrobs have been tapped to costar in Martin Scorsese's Wolf of Wall Street. Cameras started rolling on Saturday with Martin behind the lens and Leo sharing a kissing scene with a lucky actress. For his part, Matthew's been cast as Leo's boss, a day trader who mentors Leo's character, Jordan Belfort. The film is based on a book by the same name, and while Leo's been tied to the project since 2010, Matthew only signed on earlier this month.