Jackman's adorable daughter, Ava, 4, mugs for the cameras in N.Y.C. Plus: Robert Downey Jr., J. Lo, Reese Witherspoon and more

A DASH OF DOWNEY

Robert Downey Jr. suits up for his chat on the Late Show with David Letterman Wednesday in New York. The actor is in town promoting his latest flick, Sherlock Holmes, which opens Christmas Day.